5,399 results on '"Gross, J."'
Search Results
2. Coherent $\pi^0\eta d$ photoproduction at forward deuteron angles measured at BGOOD
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Figueiredo, A. J. Clara, Jude, T. C., Alef, S., Cole, P. L., Di Salvo, R., Elsner, D., Fantini, A., Freyermuth, O., Frommberger, F., Ghio, F., Groß, J., Kohl, K., Sandri, P. Levi, Mandaglio, G., Pedroni, P., Reitz, B. -E., Romaniuk, M., Scheluchin, G., Schmieden, H., Sonnenschein, A., and Tillmanns, C.
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Nuclear Experiment - Abstract
The coherent reaction, $\gamma d \rightarrow \pi^0\eta d$ was studied with the BGOOD experiment at ELSA from threshold to a centre-of-mass energy of 3200\,MeV. A full kinematic reconstruction was made, with final state deuterons identified in the forward spectrometer and $\pi^0$ and $\eta$ decays in the central BGO Rugby Ball. The strength of the differential cross section exceeds what can be described by models of coherent photoproduction at forward angles by orders of magnitude. The distribution of the differential cross section has an excellent agreement with a model including quasi-free $\Delta \pi$ photoproduction, pion re-scattering and $N(1535)$ formation and subsequent nucleon coalescence to the deuteron. This also gives a reasonable description of the two-body invariant mass distributions and naturally explains the similar magnitudes of this channel and $\pi^0\pi^0 d$ coherent photoproduction., Comment: 7 pages, 5 figures
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- 2024
3. Apollo Next Generation Sample Analysis (ANGSA): an Apollo Participating Scientist Program to Prepare the Lunar Sample Community for Artemis
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Shearer, C. K., McCubbin, F. M., Eckley, S., Simon, S. B., Meshik, A., McDonald, F., Schmitt, H. H., Zeigler, R. A., Gross, J., Mitchell, J., Krysher, C., Morris, R. V., Parai, R., Jolliff, B. L., Gillis-Davis, J. J., Joy, K. H., Bell, S. K., Lucey, P. G., Sun, L., Sharp, Z. D., Dukes, C., Sehlke, A., Mosie, A., Allton, J., Amick, C., Simon, J. I., Erickson, T. M., Barnes, J. J., Dyar, M. D., Burgess, K., Petro, N., Moriarty, D., Curran, N. M., Elsila, J. E., Colina-Ruiz, R. A., Kroll, T., Sokaras, D., Ishii, H. A., Bradley, J. P., Sears, D., Cohen, B., Pravdivseva, O., Thompson, M. S., Neal, C. R., Hana, R., Ketcham, R., and Welten, K.
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- 2024
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4. Stable Quantum-Correlated Many Body States through Engineered Dissipation
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Mi, X., Michailidis, A. A., Shabani, S., Miao, K. C., Klimov, P. V., Lloyd, J., Rosenberg, E., Acharya, R., Aleiner, I., Andersen, T. I., Ansmann, M., Arute, F., Arya, K., Asfaw, A., Atalaya, J., Bardin, J. C., Bengtsson, A., Bortoli, G., Bourassa, A., Bovaird, J., Brill, L., Broughton, M., Buckley, B. B., Buell, D. A., Burger, T., Burkett, B., Bushnell, N., Chen, Z., Chiaro, B., Chik, D., Chou, C., Cogan, J., Collins, R., Conner, P., Courtney, W., Crook, A. L., Curtin, B., Dau, A. G., Debroy, D. M., Barba, A. Del Toro, Demura, S., Di Paolo, A., Drozdov, I. K., Dunsworth, A., Erickson, C., Faoro, L., Farhi, E., Fatemi, R., Ferreira, V. S., Forati, L. F. Burgos E., Fowler, A. G., Foxen, B., Genois, E., Giang, W., Gidney, C., Gilboa, D., Giustina, M., Gosula, R., Gross, J. A., Habegger, S., Hamilton, M. C., Hansen, M., Harrigan, M. P., Harrington, S. D., Heu, P., Hoffmann, M. R., Hong, S., Huang, T., Huff, A., Huggins, W. J., Ioffe, L. B., Isakov, S. V., Iveland, J., Jeffrey, E., Jiang, Z., Jones, C., Juhas, P., Kafri, D., Kechedzhi, K., Khattar, T., Khezri, M., Kieferova, M., Kim, S., Kitaev, A., Klots, A. R., Korotkov, A. N., Kostritsa, F., Kreikebaum, J. M., Landhuis, D., Laptev, P., Lau, K. -M., Laws, L., Lee, J., Lee, K. W., Lensky, Y. D., Lester, B. J., Lill, A. T., Liu, W., Locharla, A., Malone, F. D., Martin, O., McClean, J. R., McEwen, M., Mieszala, A., Montazeri, S., Morvan, A., Movassagh, R., Mruczkiewicz, W., Neeley, M., Neill, C., Nersisyan, A., Newman, M., Ng, J. H., Nguyen, A., Nguyen, M., Niu, M. Y., OBrien, T. E., Opremcak, A., Petukhov, A., Potter, R., Pryadko, L. P., Quintana, C., Rocque, C., Rubin, N. C., Saei, N., Sank, D., Sankaragomathi, K., Satzinger, K. J., Schurkus, H. F., Schuster, C., Shearn, M. J., Shorter, A., Shutty, N., Shvarts, V., Skruzny, J., Smith, W. C., Somma, R., Sterling, G., Strain, D., Szalay, M., Torres, A., Vidal, G., Villalonga, B., Heidweiller, C. V., White, T., Woo, B. W. K., Xing, C., Yao, Z. J., Yeh, P., Yoo, J., Young, G., Zalcman, A., Zhang, Y., Zhu, N., Zobrist, N., Neven, H., Babbush, R., Bacon, D., Boixo, S., Hilton, J., Lucero, E., Megrant, A., Kelly, J., Chen, Y., Roushan, P., Smelyanskiy, V., and Abanin, D. A.
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Quantum Physics - Abstract
Engineered dissipative reservoirs have the potential to steer many-body quantum systems toward correlated steady states useful for quantum simulation of high-temperature superconductivity or quantum magnetism. Using up to 49 superconducting qubits, we prepared low-energy states of the transverse-field Ising model through coupling to dissipative auxiliary qubits. In one dimension, we observed long-range quantum correlations and a ground-state fidelity of 0.86 for 18 qubits at the critical point. In two dimensions, we found mutual information that extends beyond nearest neighbors. Lastly, by coupling the system to auxiliaries emulating reservoirs with different chemical potentials, we explored transport in the quantum Heisenberg model. Our results establish engineered dissipation as a scalable alternative to unitary evolution for preparing entangled many-body states on noisy quantum processors.
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- 2023
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5. Phase transition in Random Circuit Sampling
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Morvan, A., Villalonga, B., Mi, X., Mandrà, S., Bengtsson, A., Klimov, P. V., Chen, Z., Hong, S., Erickson, C., Drozdov, I. K., Chau, J., Laun, G., Movassagh, R., Asfaw, A., Brandão, L. T. A. N., Peralta, R., Abanin, D., Acharya, R., Allen, R., Andersen, T. I., Anderson, K., Ansmann, M., Arute, F., Arya, K., Atalaya, J., Bardin, J. C., Bilmes, A., Bortoli, G., Bourassa, A., Bovaird, J., Brill, L., Broughton, M., Buckley, B. B., Buell, D. A., Burger, T., Burkett, B., Bushnell, N., Campero, J., Chang, H. S., Chiaro, B., Chik, D., Chou, C., Cogan, J., Collins, R., Conner, P., Courtney, W., Crook, A. L., Curtin, B., Debroy, D. M., Barba, A. Del Toro, Demura, S., Di Paolo, A., Dunsworth, A., Faoro, L., Farhi, E., Fatemi, R., Ferreira, V. S., Burgos, L. Flores, Forati, E., Fowler, A. G., Foxen, B., Garcia, G., Genois, E., Giang, W., Gidney, C., Gilboa, D., Giustina, M., Gosula, R., Dau, A. Grajales, Gross, J. A., Habegger, S., Hamilton, M. C., Hansen, M., Harrigan, M. P., Harrington, S. D., Heu, P., Hoffmann, M. R., Huang, T., Huff, A., Huggins, W. J., Ioffe, L. B., Isakov, S. V., Iveland, J., Jeffrey, E., Jiang, Z., Jones, C., Juhas, P., Kafri, D., Khattar, T., Khezri, M., Kieferová, M., Kim, S., Kitaev, A., Klots, A. R., Korotkov, A. N., Kostritsa, F., Kreikebaum, J. M., Landhuis, D., Laptev, P., Lau, K. -M., Laws, L., Lee, J., Lee, K. W., Lensky, Y. D., Lester, B. J., Lill, A. T., Liu, W., Livingston, W. P., Locharla, A., Malone, F. D., Martin, O., Martin, S., McClean, J. R., McEwen, M., Miao, K. C., Mieszala, A., Montazeri, S., Mruczkiewicz, W., Naaman, O., Neeley, M., Neill, C., Nersisyan, A., Newman, M., Ng, J. H., Nguyen, A., Nguyen, M., Niu, M. Yuezhen, O'Brien, T. E., Omonije, S., Opremcak, A., Petukhov, A., Potter, R., Pryadko, L. P., Quintana, C., Rhodes, D. M., Rosenberg, E., Rocque, C., Roushan, P., Rubin, N. C., Saei, N., Sank, D., Sankaragomathi, K., Satzinger, K. J., Schurkus, H. F., Schuster, C., Shearn, M. J., Shorter, A., Shutty, N., Shvarts, V., Sivak, V., Skruzny, J., Smith, W. C., Somma, R. D., Sterling, G., Strain, D., Szalay, M., Thor, D., Torres, A., Vidal, G., Heidweiller, C. Vollgraff, White, T., Woo, B. W. K., Xing, C., Yao, Z. J., Yeh, P., Yoo, J., Young, G., Zalcman, A., Zhang, Y., Zhu, N., Zobrist, N., Rieffel, E. G., Biswas, R., Babbush, R., Bacon, D., Hilton, J., Lucero, E., Neven, H., Megrant, A., Kelly, J., Aleiner, I., Smelyanskiy, V., Kechedzhi, K., Chen, Y., and Boixo, S.
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Quantum Physics - Abstract
Undesired coupling to the surrounding environment destroys long-range correlations on quantum processors and hinders the coherent evolution in the nominally available computational space. This incoherent noise is an outstanding challenge to fully leverage the computation power of near-term quantum processors. It has been shown that benchmarking Random Circuit Sampling (RCS) with Cross-Entropy Benchmarking (XEB) can provide a reliable estimate of the effective size of the Hilbert space coherently available. The extent to which the presence of noise can trivialize the outputs of a given quantum algorithm, i.e. making it spoofable by a classical computation, is an unanswered question. Here, by implementing an RCS algorithm we demonstrate experimentally that there are two phase transitions observable with XEB, which we explain theoretically with a statistical model. The first is a dynamical transition as a function of the number of cycles and is the continuation of the anti-concentration point in the noiseless case. The second is a quantum phase transition controlled by the error per cycle; to identify it analytically and experimentally, we create a weak link model which allows varying the strength of noise versus coherent evolution. Furthermore, by presenting an RCS experiment with 67 qubits at 32 cycles, we demonstrate that the computational cost of our experiment is beyond the capabilities of existing classical supercomputers, even when accounting for the inevitable presence of noise. Our experimental and theoretical work establishes the existence of transitions to a stable computationally complex phase that is reachable with current quantum processors.
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- 2023
6. Purification-based quantum error mitigation of pair-correlated electron simulations
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O'Brien, T. E., Anselmetti, G., Gkritsis, F., Elfving, V. E., Polla, S., Huggins, W. J., Oumarou, O., Kechedzhi, K., Abanin, D., Acharya, R., Aleiner, I., Allen, R., Andersen, T. I., Anderson, K., Ansmann, M., Arute, F., Arya, K., Asfaw, A., Atalaya, J., Bacon, D., Bardin, J. C., Bengtsson, A., Boixo, S., Bortoli, G., Bourassa, A., Bovaird, J., Brill, L., Broughton, M., Buckley, B., Buell, D. A., Burger, T., Burkett, B., Bushnell, N., Campero, J., Chen, Y., Chen, Z., Chiaro, B., Chik, D., Cogan, J., Collins, R., Conner, P., Courtney, W., Crook, A. L., Curtin, B., Debroy, D. M., Demura, S., Drozdov, I., Dunsworth, A., Erickson, C., Faoro, L., Farhi, E., Fatemi, R., Ferreira, V. S., Burgos, L. Flores, Forati, E., Fowler, A. G., Foxen, B., Giang, W., Gidney, C., Gilboa, D., Giustina, M., Gosula, R., Dau, A. Grajales, Gross, J. A., Habegger, S., Hamilton, M. C., Hansen, M., Harrigan, M. P., Harrington, S. D., Heu, P., Hilton, J., Hoffmann, M. R., Hong, S., Huang, T., Huff, A., Ioffe, L. B., Isakov, S. V., Iveland, J., Jeffrey, E., Jiang, Z., Jones, C., Juhas, P., Kafri, D., Kelly, J., Khattar, T., Khezri, M., Kieferová, M., Kim, S., Klimov, P. V., Klots, A. R., Kothari, R., Korotkov, A. N., Kostritsa, F., Kreikebaum, J. M., Landhuis, D., Laptev, P., Lau, K., Laws, L., Lee, J., Lee, K., Lester, B. J., Lill, A. T., Liu, W., Livingston, W. P., Locharla, A., Lucero, E., Malone, F. D., Mandra, S., Martin, O., Martin, S., McClean, J. R., McCourt, T., McEwen, M., Megrant, A., Mi, X., Mieszala, A., Miao, K. C., Mohseni, M., Montazeri, S., Morvan, A., Movassagh, R., Mruczkiewicz, W., Naaman, O., Neeley, M., Neill, C., Nersisyan, A., Neven, H., Newman, M., Ng, J. H., Nguyen, A., Nguyen, M., Niu, M. Y., Omonije, S., Opremcak, A., Petukhov, A., Potter, R., Pryadko, L. P., Quintana, C., Rocque, C., Roushan, P., Saei, N., Sank, D., Sankaragomathi, K., Satzinger, K. J., Schurkus, H. F., Schuster, C., Shearn, M. J., Shorter, A., Shutty, N., Shvarts, V., Skruzny, J., Smelyanskiy, V., Smith, W. C., Somma, R., Sterling, G., Strain, D., Szalay, M., Thor, D., Torres, A., Vidal, G., Villalonga, B., Heidweiller, C. Vollgraff, White, T., Woo, B. W. K., Xing, C., Yao, Z. J., Yeh, P., Yoo, J., Young, G., Zalcman, A., Zhang, Y., Zhu, N., Zobrist, N., Gogolin, C., Babbush, R., and Rubin, N. C.
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Quantum Physics - Abstract
An important measure of the development of quantum computing platforms has been the simulation of increasingly complex physical systems. Prior to fault-tolerant quantum computing, robust error mitigation strategies are necessary to continue this growth. Here, we study physical simulation within the seniority-zero electron pairing subspace, which affords both a computational stepping stone to a fully correlated model, and an opportunity to validate recently introduced ``purification-based'' error-mitigation strategies. We compare the performance of error mitigation based on doubling quantum resources in time (echo verification) or in space (virtual distillation), on up to $20$ qubits of a superconducting qubit quantum processor. We observe a reduction of error by one to two orders of magnitude below less sophisticated techniques (e.g. post-selection); the gain from error mitigation is seen to increase with the system size. Employing these error mitigation strategies enables the implementation of the largest variational algorithm for a correlated chemistry system to-date. Extrapolating performance from these results allows us to estimate minimum requirements for a beyond-classical simulation of electronic structure. We find that, despite the impressive gains from purification-based error mitigation, significant hardware improvements will be required for classically intractable variational chemistry simulations., Comment: 10 pages, 13 page supplementary material, 12 figures. Experimental data available at https://doi.org/10.5281/zenodo.7225821
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- 2022
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7. Purification-based quantum error mitigation of pair-correlated electron simulations
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O’Brien, T. E., Anselmetti, G., Gkritsis, F., Elfving, V. E., Polla, S., Huggins, W. J., Oumarou, O., Kechedzhi, K., Abanin, D., Acharya, R., Aleiner, I., Allen, R., Andersen, T. I., Anderson, K., Ansmann, M., Arute, F., Arya, K., Asfaw, A., Atalaya, J., Bardin, J. C., Bengtsson, A., Bortoli, G., Bourassa, A., Bovaird, J., Brill, L., Broughton, M., Buckley, B., Buell, D. A., Burger, T., Burkett, B., Bushnell, N., Campero, J., Chen, Z., Chiaro, B., Chik, D., Cogan, J., Collins, R., Conner, P., Courtney, W., Crook, A. L., Curtin, B., Debroy, D. M., Demura, S., Drozdov, I., Dunsworth, A., Erickson, C., Faoro, L., Farhi, E., Fatemi, R., Ferreira, V. S., Flores Burgos, L., Forati, E., Fowler, A. G., Foxen, B., Giang, W., Gidney, C., Gilboa, D., Giustina, M., Gosula, R., Grajales Dau, A., Gross, J. A., Habegger, S., Hamilton, M. C., Hansen, M., Harrigan, M. P., Harrington, S. D., Heu, P., Hoffmann, M. R., Hong, S., Huang, T., Huff, A., Ioffe, L. B., Isakov, S. V., Iveland, J., Jeffrey, E., Jiang, Z., Jones, C., Juhas, P., Kafri, D., Khattar, T., Khezri, M., Kieferová, M., Kim, S., Klimov, P. V., Klots, A. R., Korotkov, A. N., Kostritsa, F., Kreikebaum, J. M., Landhuis, D., Laptev, P., Lau, K.-M., Laws, L., Lee, J., Lee, K., Lester, B. J., Lill, A. T., Liu, W., Livingston, W. P., Locharla, A., Malone, F. D., Mandrà, S., Martin, O., Martin, S., McClean, J. R., McCourt, T., McEwen, M., Mi, X., Mieszala, A., Miao, K. C., Mohseni, M., Montazeri, S., Morvan, A., Movassagh, R., Mruczkiewicz, W., Naaman, O., Neeley, M., Neill, C., Nersisyan, A., Newman, M., Ng, J. H., Nguyen, A., Nguyen, M., Niu, M. Y., Omonije, S., Opremcak, A., Petukhov, A., Potter, R., Pryadko, L. P., Quintana, C., Rocque, C., Roushan, P., Saei, N., Sank, D., Sankaragomathi, K., Satzinger, K. J., Schurkus, H. F., Schuster, C., Shearn, M. J., Shorter, A., Shutty, N., Shvarts, V., Skruzny, J., Smith, W. C., Somma, R. D., Sterling, G., Strain, D., Szalay, M., Thor, D., Torres, A., Vidal, G., Villalonga, B., Vollgraff Heidweiller, C., White, T., Woo, B. W. K., Xing, C., Yao, Z. J., Yeh, P., Yoo, J., Young, G., Zalcman, A., Zhang, Y., Zhu, N., Zobrist, N., Bacon, D., Boixo, S., Chen, Y., Hilton, J., Kelly, J., Lucero, E., Megrant, A., Neven, H., Smelyanskiy, V., Gogolin, C., Babbush, R., and Rubin, N. C.
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- 2023
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8. Pre-frontal cortex guides dimension-reducing transformations in the occipito-ventral pathway for categorization behaviors
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Duan, Y., Zhan, J., Gross, J., Ince, R. A. A., and Schyns, P. G.
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Quantitative Biology - Neurons and Cognition - Abstract
To interpret our surroundings, the brain uses a visual categorization process. Current theories and models suggest that this process comprises a hierarchy of different computations that transforms complex, high-dimensional inputs into lower-dimensional representations (i.e. manifolds) in support of multiple categorization behaviors. Here, we tested this hypothesis by analyzing these transformations reflected in dynamic MEG source activity while individual participants actively categorized the same stimuli according to different tasks: face expression, face gender, pedestrian gender, vehicle type. Results reveal three transformation stages guided by pre-frontal cortex. At Stage 1 (high-dimensional, 50-120ms), occipital sources represent both task-relevant and task-irrelevant stimulus features; task-relevant features advance into higher ventral/dorsal regions whereas task-irrelevant features halt at the occipital-temporal junction. At Stage 2 (121-150ms), stimulus feature representations reduce to lower-dimensional manifolds, which then transform into the task-relevant features underlying categorization behavior over Stage 3 (161-350ms).
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- 2022
9. New olivine morphologies in shergottites reveal complex thermal histories of martian magmas
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Eckley, S.A., Ketcham, R.A., Liu, Y., Udry, A., and Gross, J.
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- 2024
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10. Source and parental melts of poikilitic shergottites: Implications for martian magmatism
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O'Neal, Evan W., Ostwald, A.M., Udry, A., Gross, J., Righter, M., Lapen, T.J., Darling, J., Howarth, G.H., Johnsen, R., and McQuaig, D.R.
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- 2024
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11. Petrogenesis of a new type of intrusive shergottite: olivine-gabbro Northwest Africa 13227
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Benaroya, S., Gross, J., Burger, P., Righter, M., Lapen, T.J., and Eckley, S.
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- 2024
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12. Realizing topologically ordered states on a quantum processor
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Satzinger, K. J., Liu, Y., Smith, A., Knapp, C., Newman, M., Jones, C., Chen, Z., Quintana, C., Mi, X., Dunsworth, A., Gidney, C., Aleiner, I., Arute, F., Arya, K., Atalaya, J., Babbush, R., Bardin, J. C., Barends, R., Basso, J., Bengtsson, A., Bilmes, A., Broughton, M., Buckley, B. B., Buell, D. A., Burkett, B., Bushnell, N., Chiaro, B., Collins, R., Courtney, W., Demura, S., Derk, A. R., Eppens, D., Erickson, C., Farhi, E., Foaro, L., Fowler, A. G., Foxen, B., Giustina, M., Greene, A., Gross, J. A., Harrigan, M. P., Harrington, S. D., Hilton, J., Hong, S., Huang, T., Huggins, W. J., Ioffe, L. B., Isakov, S. V., Jeffrey, E., Jiang, Z., Kafri, D., Kechedzhi, K., Khattar, T., Kim, S., Klimov, P. V., Korotkov, A. N., Kostritsa, F., Landhuis, D., Laptev, P., Locharla, A., Lucero, E., Martin, O., McClean, J. R., McEwen, M., Miao, K. C., Mohseni, M., Montazeri, S., Mruczkiewicz, W., Mutus, J., Naaman, O., Neeley, M., Neill, C., Niu, M. Y., O'Brien, T. E., Opremcak, A., Pató, B., Petukhov, A., Rubin, N. C., Sank, D., Shvarts, V., Strain, D., Szalay, M., Villalonga, B., White, T. C., Yao, Z., Yeh, P., Yoo, J., Zalcman, A., Neven, H., Boixo, S., Megrant, A., Chen, Y., Kelly, J., Smelyanskiy, V., Kitaev, A., Knap, M., Pollmann, F., and Roushan, P.
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Quantum Physics ,Condensed Matter - Strongly Correlated Electrons - Abstract
The discovery of topological order has revolutionized the understanding of quantum matter in modern physics and provided the theoretical foundation for many quantum error correcting codes. Realizing topologically ordered states has proven to be extremely challenging in both condensed matter and synthetic quantum systems. Here, we prepare the ground state of the toric code Hamiltonian using an efficient quantum circuit on a superconducting quantum processor. We measure a topological entanglement entropy near the expected value of $\ln2$, and simulate anyon interferometry to extract the braiding statistics of the emergent excitations. Furthermore, we investigate key aspects of the surface code, including logical state injection and the decay of the non-local order parameter. Our results demonstrate the potential for quantum processors to provide key insights into topological quantum matter and quantum error correction., Comment: 6 pages 4 figures, plus supplementary materials
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- 2021
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13. Accurately computing electronic properties of a quantum ring
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Neill, C., McCourt, T., Mi, X., Jiang, Z., Niu, M. Y., Mruczkiewicz, W., Aleiner, I., Arute, F., Arya, K., Atalaya, J., Babbush, R., Bardin, J. C., Barends, R., Bengtsson, A., Bourassa, A., Broughton, M., Buckley, B. B., Buell, D. A., Burkett, B., Bushnell, N., Campero, J., Chen, Z., Chiaro, B., Collins, R., Courtney, W., Demura, S., Derk, A. R., Dunsworth, A., Eppens, D., Erickson, C., Farhi, E., Fowler, A. G., Foxen, B., Gidney, C., Giustina, M., Gross, J. A., Harrigan, M. P., Harrington, S. D., Hilton, J., Ho, A., Hong, S., Huang, T., Huggins, W. J., Isakov, S. V., Jacob-Mitos, M., Jeffrey, E., Jones, C., Kafri, D., Kechedzhi, K., Kelly, J., Kim, S., Klimov, P. V., Korotkov, A. N., Kostritsa, F., Landhuis, D., Laptev, P., Lucero, E., Martin, O., McClean, J. R., McEwen, M., Megrant, A., Miao, K. C., Mohseni, M., Mutus, J., Naaman, O., Neeley, M., Newman, M., O'Brien, T. E., Opremcak, A., Ostby, E., Pato, B., Petukhov, A., Quintana, C., Redd, N., Rubin, N. C., Sank, D., Satzinger, K. J., Shvarts, V., Strain, D., Szalay, M., Trevithick, M. D., Villalonga, B., White, T. C., Yao, Z., Yeh, P., Zalcman, A., Neven, H., Boixo, S., Ioffe, L. B., Roushan, P., Chen, Y., and Smelyanskiy, V.
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Quantum Physics - Abstract
A promising approach to study condensed-matter systems is to simulate them on an engineered quantum platform. However, achieving the accuracy needed to outperform classical methods has been an outstanding challenge. Here, using eighteen superconducting qubits, we provide an experimental blueprint for an accurate condensed-matter simulator and demonstrate how to probe fundamental electronic properties. We benchmark the underlying method by reconstructing the single-particle band-structure of a one-dimensional wire. We demonstrate nearly complete mitigation of decoherence and readout errors and arrive at an accuracy in measuring energy eigenvalues of this wire with an error of ~0.01 rad, whereas typical energy scales are of order 1 rad. Insight into this unprecedented algorithm fidelity is gained by highlighting robust properties of a Fourier transform, including the ability to resolve eigenenergies with a statistical uncertainty of 1e-4 rad. Furthermore, we synthesize magnetic flux and disordered local potentials, two key tenets of a condensed-matter system. When sweeping the magnetic flux, we observe avoided level crossings in the spectrum, a detailed fingerprint of the spatial distribution of local disorder. Combining these methods, we reconstruct electronic properties of the eigenstates where we observe persistent currents and a strong suppression of conductance with added disorder. Our work describes an accurate method for quantum simulation and paves the way to study novel quantum materials with superconducting qubits.
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- 2020
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14. Impact of delayed response on Wearable Cognitive Assistance
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Muñoz, M. Olguín, Klatzky, R., Wang, J., Pillai, P., Satyanarayanan, M., and Gross, J.
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Computer Science - Human-Computer Interaction ,H.5.2 - Abstract
Wearable Cognitive Assistants (WCA) are anticipated to become a widely-used application class, in conjunction with emerging network infrastructures like 5G that incorporate edge computing capabilities. While prototypical studies of such applications exist today, the relationship between infrastructure service provisioning and its implication for WCA usability is largely unexplored despite the relevance that these applications have for future networks. This paper presents an experimental study assessing how WCA users react to varying end-to-end delays induced by the application pipeline or infrastructure. Participants interacted directly with an instrumented task-guidance WCA as delays were introduced into the system in a controllable fashion. System and task state were tracked in real time, and biometric data from wearable sensors on the participants were recorded. Our results show that periods of extended system delay cause users to correspondingly (and substantially) slow down in their guided task execution, an effect that persists for a time after the system returns to a more responsive state. Furthermore, the slow-down in task execution is correlated with a personality trait, neuroticism, associated with intolerance for time delays. We show that our results implicate impaired cognitive planning, as contrasted with resource depletion or emotional arousal, as the reason for slowed user task executions under system delay. The findings have several implications for the design and operation of WCA applications as well as computational and communication infrastructure, and additionally for the development of performance analysis tools for WCA., Comment: 27 pages, 14 figures. Submitted to PLOS ONE on October 15, 2020
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- 2020
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15. A satellite orbit drift in binary near-Earth asteroids (66391) 1999 KW4 and (88710) 2001 SL9 -- Indication of the BYORP effect
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Scheirich, P., Pravec, P., Kušnirák, P., Hornoch, K., McMahon, J., Scheeres, D. J., Čapek, D., Pray, D. P., Kučáková, H., Galád, A., Vraštil, J., Krugly, Yu. N., Moskovitz, N., Avner, L. D., Skiff, B., McMillan, R. S., Larsen, J. A., Brucker, M. J., Tubbiolo, A. F., Cooney, W. R., Gross, J., Terrell, D., Burkhonov, O., Ergashev, K. E., Ehgamberdiev, Sh. A., Fatka, P., Durkee, R., Schunova, E. Lilly, Inasaridze, R. Ya., Ayvazian, V. R., Kapanadze, G., Gaftonyuk, N. M., Sanchez, J. A., Reddy, V., McGraw, L., Kelley, M. S., and Molotov, I. E.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
We obtained thorough photometric observations of two binary near-Earth asteroids (66391) Moshup = 1999 KW4 and (88710) 2001 SL9 taken from 2000 to 2019 and derived physical and dynamical properties of the binary systems. We found that the data for 1999 KW4 are inconsistent with a constant orbital period and we obtained unique solution with a quadratic drift of the mean anomaly of the satellite of -0.65 +/- 0.16 deg/yr2 (all quoted uncertainties are 3sigma). This means that the semimajor axis of the mutual orbit of the components of this binary system increases in time with a mean rate of 1.2 +/- 0.3 cm/yr. The data for 2001 SL9 are also inconsistent with a constant orbital period and we obtained two solutions for the quadratic drift of the mean anomaly: 2.8 +/- 0.2 and 5.2 +/- 0.2 deg/yr2, implying that the semimajor axis of the mutual orbit of the components decreases in time with a mean rate of -2.8 +/- 0.2 or -5.1 +/- 0.2 cm/yr for the two solutions, respectively. The expanding orbit of 1999 KW4 may be explained by mutual tides interplaying with binary YORP (BYORP) effect (McMahon and Scheeres, 2010). However, a modeling of the BYORP drift using radar-derived shapes of the binary components predicted a much higher value of the orbital drift than the observed one. It suggests that either the radar-derived shape model of the secondary is inadequate for computing the BYORP effect, or the present theory of BYORP overestimates it. It is possible that the BYORP coefficient has instead an opposite sign than predicted; in that case, the system may be moving into an equilibrium between the BYORP and the tides. In the case of 2001 SL9, the BYORP effect is the only known physical mechanism that can cause the inward drift of its mutual orbit., Comment: 44 pages, 17 figures. Accepted for publication in Icarus journal
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- 2019
16. Formation of robust bound states of interacting microwave photons
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Morvan, A., Andersen, T. I., Mi, X., Neill, C., Petukhov, A., Kechedzhi, K., Abanin, D. A., Michailidis, A., Acharya, R., Arute, F., Arya, K., Asfaw, A., Atalaya, J., Bardin, J. C., Basso, J., Bengtsson, A., Bortoli, G., Bourassa, A., Bovaird, J., Brill, L., Broughton, M., Buckley, B. B., Buell, D. A., Burger, T., Burkett, B., Bushnell, N., Chen, Z., Chiaro, B., Collins, R., Conner, P., Courtney, W., Crook, A. L., Curtin, B., Debroy, D. M., Del Toro Barba, A., Demura, S., Dunsworth, A., Eppens, D., Erickson, C., Faoro, L., Farhi, E., Fatemi, R., Flores Burgos, L., Forati, E., Fowler, A. G., Foxen, B., Giang, W., Gidney, C., Gilboa, D., Giustina, M., Grajales Dau, A., Gross, J. A., Habegger, S., Hamilton, M. C., Harrigan, M. P., Harrington, S. D., Hoffmann, M., Hong, S., Huang, T., Huff, A., Huggins, W. J., Isakov, S. V., Iveland, J., Jeffrey, E., Jiang, Z., Jones, C., Juhas, P., Kafri, D., Khattar, T., Khezri, M., Kieferová, M., Kim, S., Kitaev, A. Y., Klimov, P. V., Klots, A. R., Korotkov, A. N., Kostritsa, F., Kreikebaum, J. M., Landhuis, D., Laptev, P., Lau, K.-M., Laws, L., Lee, J., Lee, K. W., Lester, B. J., Lill, A. T., Liu, W., Locharla, A., Malone, F., Martin, O., McClean, J. R., McEwen, M., Meurer Costa, B., Miao, K. C., Mohseni, M., Montazeri, S., Mount, E., Mruczkiewicz, W., Naaman, O., Neeley, M., Nersisyan, A., Newman, M., Nguyen, A., Nguyen, M., Niu, M. Y., O’Brien, T. E., Olenewa, R., Opremcak, A., Potter, R., Quintana, C., Rubin, N. C., Saei, N., Sank, D., Sankaragomathi, K., Satzinger, K. J., Schurkus, H. F., Schuster, C., Shearn, M. J., Shorter, A., Shvarts, V., Skruzny, J., Smith, W. C., Strain, D., Sterling, G., Su, Y., Szalay, M., Torres, A., Vidal, G., Villalonga, B., Vollgraff-Heidweiller, C., White, T., Xing, C., Yao, Z., Yeh, P., Yoo, J., Zalcman, A., Zhang, Y., Zhu, N., Neven, H., Bacon, D., Hilton, J., Lucero, E., Babbush, R., Boixo, S., Megrant, A., Kelly, J., Chen, Y., Smelyanskiy, V., Aleiner, I., Ioffe, L. B., and Roushan, P.
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- 2022
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17. Asteroid pairs: a complex picture
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Pravec, P., Fatka, P., Vokrouhlický, D., Scheirich, P., Ďurech, J., Scheeres, D. J., Kušnirák, P., Hornoch, K., Galád, A., Pray, D. P., Krugly, Yu. N., Burkhonov, O., Ehgamberdiev, Sh. A., Pollock, J., Moskovitz, N., Ortiz, J. L., Morales, N., Husárik, M., Inasaridze, R. Ya., Oey, J., Polishook, D., Hanuš, J., Kučáková, H., Vraštil, J., Világi, J., Gajdoš, Š., Kornoš, L., Vereš, P., Gaftonyuk, N. M., Hromakina, T., Sergeyev, A. V., Slyusarev, I. G., Ayvazian, V. R., Cooney, W. R., Gross, J., Terrell, D., Colas, F., Vachier, F., Slivan, S., Skiff, B., Marchis, F., Ergashev, K. E., Aznar, D. -H. Kim A., Serra-Ricart, M., Behrend, R., Roy, R., Manzini, F., and Molotov, I. E.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
We studied 93 asteroid pairs. We estimated times elapsed since separation of pair members that are between 7*10^3 and a few 10^6 yr. We derived the rotation periods for all the primaries and a sample of secondaries. We derived the absolute magnitude differences of the asteroid pairs that provide their mass ratios. We refined their WISE geometric albedos and estimated their taxonomic classifications. For 17 pairs, we determined their pole positions. In 2 pairs where we obtained the spin poles for both components, we saw the same sense of rotation for both components and constrained the angles between their original spin vectors at the time of their separation. We found that the primaries of 13 pairs are actually binary or triple systems, i.e., they have one or two bound secondaries (satellites). As by-product, we found 3 new young asteroid clusters (each of them consisting of three known asteroids on highly similar orbits). We compared the obtained asteroid pair data with theoretical predictions and discussed their implications. We found that 86 of the 93 studied pairs follow the trend of primary rotation period vs mass ratio that was found by Pravec et al. (2010). Of the 7 outliers, 3 appear insignificant (may be due to our uncertain or incomplete knowledge), but 4 are high mass ratio pairs that were unpredicted by the theory of asteroid pair formation by rotational fission. We discuss a (remotely) possible way that they could be created by rotational fission of flattened parent bodies followed by re-shaping of the formed components. The 13 pairs with binary primaries are particularly interesting systems that place important constraints on formation and evolution of asteroid pairs. We present two hypotheses for their formation: The pairs having both bound and unbound secondaries could be `failed asteroid clusters', or they could be formed by a cascade primary spin fission process., Comment: Submitted to Icarus on 2019 January 7. The Electronic Supplementary Information to this paper is at http://www.asu.cas.cz/~asteroid/astpairscomplex_si.pdf
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- 2019
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18. Repeatable approaches to work with scientific uncertainty and advance climate change adaptation in US national parks
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Runyon, A. N., Carlson, A. R., Gross, J., Lawrence, D. J., and Schuurman, G. W.
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Climate Change - Published
- 2020
19. Robot-assisted techniques in vascular and endovascular surgery
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Püschel, A., Schafmayer, C., and Groß, J.
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- 2022
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20. Current and Future Advanced Imaging Modalities for the Diagnosis of Early Osteoarthritis of the Hip
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Mills ES, Becerra JA, Yensen K, Bolia IK, Shontz EC, Kebaish KJ, Dobitsch A, Hasan LK, Haratian A, Ong CD, Gross J, Petrigliano FA, and Weber AE
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hip ,pre-osteoarthritis ,dgemric ,7t mri ,qmri ,oct ,Orthopedic surgery ,RD701-811 ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Emily S Mills,1 Jacob A Becerra,1 Katie Yensen,1 Ioanna K Bolia,1 Edward C Shontz,1 Kareem J Kebaish,1 Andrew Dobitsch,1 Laith K Hasan,1 Aryan Haratian,1 Charlton D Ong,2 Jordan Gross,2 Frank A Petrigliano,1 Alexander E Weber1 1Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA; 2Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USACorrespondence: Ioanna K Bolia, USC Epstein Family Center for Sports Medicine at Keck Medicine of USC, 1520 San Pablo st #2000, Los Angeles, CA, 90033, USA, Tel +1 9703432813, Fax +8181 658 5920, Email ioanna.bolia-kavouklis@med.usc.eduAbstract: Hip osteoarthritis (OA) can be idiopathic or develop secondary to structural joint abnormalities of the hip joint (alteration of normal anatomy) and/or due to a systemic condition with joint involvement. Early osteoarthritic changes to the hip can be completely asymptomatic or may cause the development hip symptomatology without evidence of OA on radiographs. Delaying the progression of hip OA is critical due to the significant impact of this condition on the patient’s quality of life. Pre-OA of the hip is a newly established term that is often described as the development of signs and symptoms of degenerative hip disease but no radiographic evidence of OA. Advanced imaging methods can help to diagnose pre-OA of the hip in patients with hip pain and normal radiographs or aid in the surveillance of asymptomatic patients with an underlying hip diagnosis that is known to increase the risk of early OA of the hip. These methods include the delayed gadolinium-enhanced magnetic resonance imaging (MRI) of cartilage (dGEMRIC), quantitative magnetic resonance imaging (qMRI- T1rho, T2, and T2* relaxation time mapping), 7-Tesla MRI, computed tomography (CT), and optical coherence tomography (OCT). dGEMRIC proved to be a reliable and accurate modality though it is limited by the significant time necessary for contrast washout between scans. This disadvantage is potentially overcome by T2 weighted MRIs, which do not require contrast. 7-Tesla MRI is a promising development for enhanced imaging resolution compared to 1.5 and 3T MRIs. This technique does require additional optimization and development prior to widespread clinical use. The purpose of this review was to summarize the results of translational and clinical studies investigating the utilization of the above-mentioned imaging modalities to diagnose hip pre-OA, with special focus on recent research evaluating their implementation into clinical practice.Keywords: hip, pre-osteoarthritis, dGEMRIC, 7T MRI, qMRI, OCT, delayed gadolinium-enhanced magnetic resonance imaging of cartilage, optical coherence tomography, quantitative magnetic resonance imaging
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- 2022
21. Estimating gear selectivity and population composition of common whelks Buccinum undatum from tagging experiments and comparative gear trials
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Colvin, C. N., primary, Phillips, E. C., additional, Hoenig, J. M., additional, Gross, J. M., additional, and Hold, N., additional
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- 2024
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22. AB1508 IMPACT OF A MULTIMODAL TRAINING IN INTERVENTIONAL RHEUMATOLOGY ON THE PRACTICE OF ULTRASOUND-GUIDED PROCEDURES
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Bauerheim, M., primary, Arnolfo, P., additional, Gross, J., additional, Maillet, J., additional, Cormier, G., additional, Varin, S., additional, Le Goff, B., additional, and Darrieutort-Laffite, C., additional
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- 2024
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23. EPS6.10 Molecular epidemiologic investigation of nontuberculous mycobacteria: identifying healthcare-associated transmission and acquisition
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Gross, J., primary, Caceres, S., additional, Epperson, L.E., additional, Hasan, N., additional, Jia, F., additional, Honda, J., additional, Strand, M., additional, Calado de Moura, V., additional, Strong, M., additional, and Nick, J., additional
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- 2024
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24. A taste of space: Remote animal observations and discrete‐choice models provide new insights into foraging and density dynamics for a large subarctic herbivore
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Ehlers, L., primary, Palm, E., additional, Herriges, J., additional, Bentzen, T., additional, Suitor, M., additional, Joly, K., additional, Millspaugh, J., additional, Donnelly, P., additional, Gross, J., additional, Wells, J., additional, Larue, B., additional, and Hebblewhite, M., additional
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- 2024
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25. Emplacement of shergottites in the Martian crust inferred from three‐dimensional petrofabric and crystal size distribution analyses
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Eckley, S. A., primary, Ketcham, R. A., additional, Liu, Y., additional, Gross, J., additional, and McCubbin, F. M., additional
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- 2024
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26. Prediction and validation of the strongly modulated forced response of two beams undergoing frictional impacts
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Monjaraz-Tec, C., Kohlmann, L., Schwarz, S., Hartung, A., Gross, J., and Krack, M.
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- 2022
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27. Relevance of impaired cognition for compensatory swallowing network resource allocation in dual-task situations
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Suntrup-Krüger, S., primary, Muhle, P., additional, Slavik, J., additional, von Itter, J., additional, Wollbrink, A., additional, Wirth, R., additional, Warnecke, T., additional, Dziewas, R., additional, Groß, J., additional, and Labeit, B., additional
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- 2024
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28. Can extending time between vital sign checks improve sleep in hematopoietic stem cell transplant patients? Testing feasibility, acceptability, and preliminary efficacy
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Daniel, Lauren C., primary, Venella, Kimberly L., additional, Woodard, Kelsey, additional, Poliakova, Polina, additional, Gross, J. Yael, additional, Bercovitz, Iris N., additional, Moore, Dirk, additional, Barakat, Lamia P., additional, and Freedman, Jason L., additional
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- 2024
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29. Gerrymandering for Interfaces: Modeling the Mechanics of Jointed Structures
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Dreher, T., Balaji, Nidish Narayanaa, Groß, J., Brake, Matthew R. W., Krack, M., Zimmerman, Kristin B., Series Editor, Kerschen, Gaetan, editor, Brake, M. R. W., editor, and Renson, Ludovic, editor
- Published
- 2020
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30. Contralateral Stenosis and Echolucent Plaque Morphology are Associated with Elevated Stroke Risk in Patients Treated with Asymptomatic Carotid Artery Stenosis within a Controlled Clinical Trial (SPACE-2)
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Beyersdorf, F, Grügerny, M, Macharzina, R-R, Lechner, G, Menz, C, Schonhardt, S, Weinbeck, M, Greb, O, Otto, D, Winker, T, Berger, H, Poppert, H, Pütz, V, Haase, K, Bodechtel, U, Weiss, N, Bergert, H, Meyne, J, Groß, J, Botsch, A, Kruse, M, Gerdes, B, Reinbold, WD, Wuttig, H, Maier-Hasselmann, A, Segerer, M, Fuchs, H-H, Gass, S, Schultz, H, Groden, C, Niedergethman, M, Griebe, M, Rosenkranz, M, Beck, C, Thomalla, G, Zeumer, H, Jauß, M, Kneist, W, Kneist, M, Staudacher, T, Bernhard, A, Jost, D, Prey, N, Knippschild, J, Kastrup, O, Köhrmann, M, Frank, B, Bongers, V, Hoffmann, J, Kniemeyer, H-W, Knauth, M, Wasser, K, Stojanovic, T, Emmert, H, Tacke, J, Schwalbe, B, Nam, E-M, van Lengerich, U, Lowens, S, Gröschel, K, Uphaus, T, Gröschel, S, Boor, S, Dorweiler, B, Schmid, E, Henkes, H, Hupp, T, Singer, O, Hamann, G, Wagner-Heck, M, Kerth-Krick, S, Kilic, M, Huppert, P, Niederkorn, K, Fruhwirth, J, Klein, G, Pulkowski, U, Jöster, K, Wacks, J-H, Kloppmann, E, Vatankhah, B, Hopf-Jensen, S, Stolze, H, Müller-Hülsbeck, S, Walluscheck, KP, Schmitt, H-M, Grüger, A, Seemann, J, Tilahun, B, Dichgans, M, Wollenweber, F, Dörr, A, Zollver, A, Gäbel, G, Hedtmann, G, Kollmar, R, Claus, D, Petermann, C, Kirsch, S, Bosnjak, B, Heiß, J, Mühling, H, Wunderlich, S, Sabisch, PN, Gahn, G, Storck, M, Arnold, S, Fischer, U, Gralla, J, von Mering, M, Dißmann, R, Kirsch, D, Schmidauer, C, Waldenberger, P, Furtner, M, Kazarians, H, Breuer, P, Arning, C, Rieper, J, Schmidt, G, Arnold, M, Schroth, G, Weise, J, Zanow, J, Mayer, T, Töpper, R, Gross-Fengels, W, Daum, H, Dittrich, R, Ritter, M, Kasprzak, B, Torsello, G, Pohlmann, C, Brüning, R, Amiri, H, Ludwig, I, Blessing, E, Möhlenbruch, M, Crispin, A, Hofman, M, Müller, T, Reiff, Tilman, Eckstein, Hans-Henning, Mansmann, Ulrich, Jansen, Olav, Fraedrich, Gustav, Mudra, Harald, Böckler, Dittmar, Böhm, Michael, Brückmann, Hartmut, Debus, E. Sebastian, Fiehler, Jens, Mathias, Klaus, Ringelstein, E. Bernd, Schmidli, Jürg, Stingele, Robert, Zahn, Ralf, Zeller, Thomas, Niesen, Wolf-Dirk, Barlinn, Kristian, Binder, Andreas, Glahn, Jörg, and Ringleb, Peter Arthur
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- 2021
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31. A satellite orbit drift in binary near-Earth asteroids (66391) 1999 KW4 and (88710) 2001 SL9 — Indication of the BYORP effect
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Scheirich, P., Pravec, P., Kušnirák, P., Hornoch, K., McMahon, J., Scheeres, D.J., Čapek, D., Pray, D.P., Kučáková, H., Galád, A., Vraštil, J., Krugly, Yu N., Moskovitz, N., Avner, L.D., Skiff, B., McMillan, R.S., Larsen, J.A., Brucker, M.J., Tubbiolo, A.F., Cooney, W.R., Gross, J., Terrell, D., Burkhonov, O., Ergashev, K.E., Ehgamberdiev, Sh.A., Fatka, P., Durkee, R., Schunova, E. Lilly, Inasaridze, R. Ya, Ayvazian, V.R., Kapanadze, G., Gaftonyuk, N.M., Sanchez, J.A., Reddy, V., McGraw, L., Kelley, M.S., and Molotov, I.E.
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- 2021
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32. Towards optimal mixtures of working fluids: Integrated design of processes and mixtures for Organic Rankine Cycles
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Schilling, J., Entrup, M., Hopp, M., Gross, J., and Bardow, A.
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- 2021
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33. Accurately computing the electronic properties of a quantum ring
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Neill, C., McCourt, T., Mi, X., Jiang, Z., Niu, M. Y., Mruczkiewicz, W., Aleiner, I., Arute, F., Arya, K., Atalaya, J., Babbush, R., Bardin, J. C., Barends, R., Bengtsson, A., Bourassa, A., Broughton, M., Buckley, B. B., Buell, D. A., Burkett, B., Bushnell, N., Campero, J., Chen, Z., Chiaro, B., Collins, R., Courtney, W., Demura, S., Derk, A. R., Dunsworth, A., Eppens, D., Erickson, C., Farhi, E., Fowler, A. G., Foxen, B., Gidney, C., Giustina, M., Gross, J. A., Harrigan, M. P., Harrington, S. D., Hilton, J., Ho, A., Hong, S., Huang, T., Huggins, W. J., Isakov, S. V., Jacob-Mitos, M., Jeffrey, E., Jones, C., Kafri, D., Kechedzhi, K., Kelly, J., Kim, S., Klimov, P. V., Korotkov, A. N., Kostritsa, F., Landhuis, D., Laptev, P., Lucero, E., Martin, O., McClean, J. R., McEwen, M., Megrant, A., Miao, K. C., Mohseni, M., Mutus, J., Naaman, O., Neeley, M., Newman, M., O’Brien, T. E., Opremcak, A., Ostby, E., Pató, B., Petukhov, A., Quintana, C., Redd, N., Rubin, N. C., Sank, D., Satzinger, K. J., Shvarts, V., Strain, D., Szalay, M., Trevithick, M. D., Villalonga, B., White, T. C., Yao, Z., Yeh, P., Zalcman, A., Neven, H., Boixo, S., Ioffe, L. B., Roushan, P., Chen, Y., and Smelyanskiy, V.
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- 2021
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34. Root geometry of polynomial sequences II: Type (1,0)
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Gross, J. L., Mansour, T., Tucker, T. W., and Wang, D. G. L.
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Mathematics - Classical Analysis and ODEs ,Mathematics - Combinatorics - Abstract
We consider the sequence of polynomials $W_n(x)$ defined by the recursion $W_n(x)=(ax+b)W_{n-1}(x)+dW_{n-2}(x)$, with initial values $W_0(x)=1$ and $W_1(x)=t(x-r)$, where $a,b,d,t,r$ are real numbers, $a,t>0$, and $d<0$. We show that every polynomial $W_n(x)$ is distinct-real-rooted, and that the roots of the polynomial $W_n(x)$ interlace the roots of the polynomial $W_{n-1}(x)$. We find that, as $n\to\infty$, the sequence of smallest roots of the polynomials $W_n(x)$ converges decreasingly to a real number, and that the sequence of largest roots converges increasingly to a real number. Moreover, by using the Dirichlet approximation theorem, we prove that there is a number to which, for every positive integer $i\ge2$, the sequence of $i$th smallest roots of the polynomials $W_n(x)$ converges. Similarly, there is a number to which, for every positive integer $i\ge2$, the sequence of $i$th largest roots of the polynomials $W_n(x)$ converges. It turns out that these two convergence points are independent of the numbers $t$ and $r$, as well as $i$. We derive explicit expressions for these four limit points, and we determine completely when some of these limit points coincide., Comment: 37 pages
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- 2015
35. Root geometry of polynomial sequences I: Type $(0,1)$
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Gross, J. L., Mansour, T., Tucker, T. W., and Wang, D. G. L.
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Mathematics - Combinatorics - Abstract
This paper is concerned with the distribution in the complex plane of the roots of a polynomial sequence $\{W_n(x)\}_{n\ge0}$ given by a recursion $W_n(x)=aW_{n-1}(x)+(bx+c)W_{n-2}(x)$, with $W_0(x)=1$ and $W_1(x)=t(x-r)$, where $a>0$, $b>0$, and $c,t,r\in\mathbb{R}$. Our results include proof of the distinct-real-rootedness of every such polynomial $W_n(x)$, derivation of the best bound for the zero-set $\{x\mid W_n(x)=0\ \text{for some $n\ge1$}\}$, and determination of three precise limit points of this zero-set. Also, we give several applications from combinatorics and topological graph theory., Comment: 24 pages, 1 figure
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- 2015
36. Log-concavity of the genus polynomials of Ringel ladders
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Gross, J. L., Mansour, T., Tucker, T. W., and Wang, D. G. L.
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Mathematics - Combinatorics ,05A15, 05A20, 05C10 - Abstract
A Ringel ladder can be formed by a self-bar-amalgamation operation on a symmetric ladder, that is, by joining the root vertices on its end-rungs. The present authors have previously derived criteria under which linear chains of copies of one or more graphs have log-concave genus polynomials. Herein we establish Ringel ladders as the first significant non-linear infinite family of graphs known to have log-concave genus polynomials. We construct an algebraic representation of self-bar-amalgamation as a matrix operation, to be applied to a vector representation of the partitioned genus distribution of a symmetric ladder. Analysis of the resulting genus polynomial involves the use of Chebyshev polynomials. This paper continues our quest to affirm the quarter-century-old conjecture that all graphs have log-concave genus polynomials., Comment: 16 pages, 6 figures
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- 2015
37. Iterated claws have real-rooted genus polynomials
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Gross, J. L., Mansour, T., Tucker, T. W., and Wang, D. G. L.
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Mathematics - Combinatorics ,05A15, 05A20, 05C10 - Abstract
We prove that the genus polynomials of the graphs called iterated claws are real-rooted. This continues our work directed toward the 25-year-old conjecture that the genus distribution of every graph is log-concave. We have previously established log-concavity for sequences of graphs constructed by iterative vertex-amalgamation or iterative edge-amalgamation of graphs that satisfy a commonly observable condition on their partitioned genus distributions, even though it had been proved previously that iterative amalgamation does not always preserve real-rootedness of the genus polynomial of the iterated graph. In this paper, the iterated topological operations are adding a claw and adding a 3-cycle, rather than vertex- or edge-amalgamation. Our analysis here illustrates some advantages of employing a matrix representation of the transposition of a set of productions., Comment: 12 pages, 1 figure
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- 2015
38. Enhancement of aerobic fitness improves social functioning in individuals with schizophrenia
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Kimhy, D., Tay, C., Vakhrusheva, J., Beck-Felts, K., Ospina, L. H., Ifrah, C., Parvaz, M., Gross, J. J., and Bartels, M. N.
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- 2021
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39. Impact sur la pratique des gestes échoguidés d’une formation universitaire à la rhumatologie interventionnelle
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Darrieutort-Laffite, C., primary, Arnolfo, P., additional, Gross, J., additional, Maillet, J., additional, Cormier, G., additional, Varin, S., additional, and Le Goff, B., additional
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- 2023
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40. Patterns of Failure in Pediatric and Young Adult Rhabdomyosarcoma
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Bhatia, R., primary, Ke, S., additional, Hu, C., additional, Debs, P., additional, Chang, L., additional, Gross, J., additional, Pratilas, C.A., additional, Ladra, M., additional, and Acharya, S., additional
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- 2023
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41. 51 Home-collected sputum samples for Aspergillus fumigatus detection in adults with cystic fibrosis
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Hong, G., primary, Koshy, A., additional, Hsu, J., additional, Memon, W., additional, Vesely, E., additional, O’Dea, A., additional, Greene, A., additional, Dezube, R., additional, Wilson, A., additional, Gross, J., additional, Goss, C., additional, Nichols, D., additional, Goss, L., additional, Cramer, R., additional, and Zhang, S., additional
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- 2023
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42. Effective potentials between gold nano crystals -- functional dependence on the temperature
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Bauer, G., Lange, A., Gribova, N., Holm, C., and Groß, J.
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Condensed Matter - Soft Condensed Matter - Abstract
A method is presented that allows to combine the effective potential between two nano crystals, the potential of mean force (PMF), as obtained from all-atomistic Molecular Dynamics simulations with perturbation theory. In this way, a functional dependence of the PMF on temperature is derived, that enables the prediction of the PMF in a wide temperature range. We applied the method for systems of capped gold nano crystals of different size. They show very good agreement with data from atomistic simulations., Comment: 7 pages, 4 figures
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- 2014
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43. Shift work and cancer : more research needed from low and middle income countries
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Groß, J Valérie, Fritschi, Lin, and Erren, Thomas C
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- 2019
44. Direct numerical simulation of sublimating ice particles
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Reitzle, M., Ruberto, S., Stierle, R., Gross, J., Janzen, T., and Weigand, B.
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- 2019
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45. Massively Parallel Rule-Based Interpreter Execution on GPUs Using Thread Compaction
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Köster, M., Groß, J., and Krüger, A.
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- 2020
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46. No effect of acidification or freezing on urinary metanephrine levels
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Pinto, L. C., Kramer, C. K., Camargo, J. L., Canani, L. H., Gross, J. L., and Leitão, C. B.
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- 2020
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47. HP1 reshapes nucleosome core to promote phase separation of heterochromatin
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Sanulli, S., Trnka, M. J., Dharmarajan, V., Tibble, R. W., Pascal, B. D., Burlingame, A. L., Griffin, P. R., Gross, J. D., and Narlikar, G. J.
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- 2019
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48. Analysis of the rotation period of asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger - search for the YORP effect
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Durech, J., Vokrouhlicky, D., Baransky, A. R., Breiter, S., Burkhonov, O. A., Cooney, W., Fuller, V., Gaftonyuk, N. M., Gross, J., Inasaridze, R. Ya., Kaasalainen, M., Krugly, Yu. N., Kvaratshelia, O. I., Litvinenko, E. A., Macomber, B., Marchis, F., Molotov, I. E., Oey, J., Polishook, D., Pollock, J., Pravec, P., Sarneczky, K., Shevchenko, V. G., Slyusarev, I., Stephens, R., Szabo, Gy., Terrell, D., Vachier, F., Vanderplate, Z., Viikinkoski, M., and Warner, B. D.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
The spin state of small asteroids can change on a long timescale by the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, the net torque that arises from anisotropically scattered sunlight and proper thermal radiation from an irregularly-shaped asteroid. The secular change in the rotation period caused by the YORP effect can be detected by analysis of asteroid photometric lightcurves. We analyzed photometric lightcurves of near-Earth asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger with the aim to detect possible deviations from the constant rotation caused by the YORP effect. We carried out new photometric observations of the three asteroids, combined the new lightcurves with archived data, and used the lightcurve inversion method to model the asteroid shape, pole direction, and rotation rate. The YORP effect was modeled as a linear change in the rotation rate in time d\omega /dt. Values of d\omega/ dt derived from observations were compared with the values predicted by theory. We derived physical models for all three asteroids. We had to model Eger as a nonconvex body because the convex model failed to fit the lightcurves observed at high phase angles. We probably detected the acceleration of the rotation rate of Eger d\omega / dt = (1.4 +/- 0.6) x 10^{-8} rad/d (3\sigma error), which corresponds to a decrease in the rotation period by 4.2 ms/yr. The photometry of Cerberus and Ra-Shalom was consistent with a constant-period model, and no secular change in the spin rate was detected. We could only constrain maximum values of |d\omega / dt| < 8 x 10^{-9} rad/d for Cerberus, and |d\omega / dt| < 3 x 10^{-8} rad/d for Ra-Shalom.
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- 2012
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49. Efficacy and safety of oral semaglutide with flexible dose adjustment versus sitagliptin in type 2 diabetes (PIONEER 7): a multicentre, open-label, randomised, phase 3a trial
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Akın, S, Aladağ, N, Arif, A A, Aronne, L J, Aronoff, S, Ataoglu, E, Baik, S H, Bays, H, Beckett, P L, Berker, D, Bilz, S, Bode, B, Braun, E W, Buse, J B, Canani, L H S, Cho, Y M, Chung, C H, Colin, I, Condit, J, Cooper, J, Delgado, B, Eagerton, D C, El Ebrashy, I N, El Hefnawy, M H M F, Eliaschewitz, F G, Finneran, M P, Fischli, S, Fließer-Görzer, E, Geohas, J, Godbole, N A, Golay, A, Gorban de Lapertosa, S, Gross, J L, Gulseth, H L, Helland, F, Høivik, H O, Issa, C, Kang, E S, Keller, C, Khalil, S H A, Kim, N H, Kim, I J, Klaff, L J, Laimer, M, LaRocque, J C, Lederman, S N, Lee, K-W, Litchfield, W R, Manning, M B, Mertens, A, Morawski, E J, Murray, A V, Nicol, P R, O'Connor, T M, Oğuz, A, Ong, S, Özdemir, A, Palace, E M, Palchick, B A, Pereles-Ortiz, J, Pieber, T, Prager, R, Preumont, V, Riffer, E, Rista, L, Rudofsky, G, Sarı, R, Scheen, A, Schultes, B, Seo, J A, Shelbaya, S A, Sivalingam, K, Sorli, C H, Stäuble, S, Streja, D A, T'Sjoen, G, Tetiker, T, Van Gaal, L, Vercammen, C, Warren, M L, Weinstein, D L, Weiss, D, White, A, Winnie, M, Wium, C, Yavuz, D, Pieber, Thomas R, Bode, Bruce, Mertens, Ann, Cho, Young Min, Christiansen, Erik, Hertz, Christin L, Wallenstein, Signe O R, and Buse, John B
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- 2019
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50. Scoring systems in the critically ill: uses, cautions, and future directions
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Desai, N. and Gross, J.
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- 2019
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