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Your search keyword '"Daley, Andrew J"' showing total 30 results
Start Over Author "Daley, Andrew J" Publisher american physical society (aps)
30 results on '"Daley, Andrew J"'

5. Dynamics of rotated spin states and magnetic ordering with two-component bosonic atoms in optical lattices

Author

MIT-Harvard Center for Ultracold Atoms, Massachusetts Institute of Technology. Department of Physics, Venegas-Gomez, Araceli, Buyskikh, Anton S., Schachenmayer, Johannes, Ketterle, Wolfgang, Daley, Andrew J., MIT-Harvard Center for Ultracold Atoms, Massachusetts Institute of Technology. Department of Physics, Venegas-Gomez, Araceli, Buyskikh, Anton S., Schachenmayer, Johannes, Ketterle, Wolfgang, and Daley, Andrew J.

Abstract

© 2020 American Physical Society. The microscopic control available over cold atoms in optical lattices has opened new opportunities to study the properties of quantum spin models. While a lot of attention is focused on experimentally realizing ground or thermal states via adiabatic loading, it would often be more straightforward to prepare specific simple product states and to probe the properties of interacting spins by observing their dynamics. We explore this possibility for spin-1/2 and spin-1 models that can be realized with bosons in optical lattices, and which exhibit XY-ferromagnetic (or counterflow spin-superfluid) phases. We consider the dynamics of initial spin-rotated states corresponding to a mean-field version of the phases of interest. Using matrix product state methods in one dimension, we compute both nonequilibrium dynamics and ground and thermal states for these systems. We compare and contrast their behavior in terms of correlation functions and induced spin currents, which should be directly observable with current experimental techniques. We find that although spin correlations decay substantially at large distances and on long timescales, for induction of spin currents, the rotated states behave similarly to the ground states on experimentally observable timescales.

Published
2022

8. Dynamics of rotated spin states and magnetic ordering with two-component bosonic atoms in optical lattices

Author

Venegas-Gomez, Araceli, Buyskikh, Anton S, Schachenmayer, Johannes, Ketterle, Wolfgang, Daley, Andrew J, Venegas-Gomez, Araceli, Buyskikh, Anton S, Schachenmayer, Johannes, Ketterle, Wolfgang, and Daley, Andrew J

Abstract

© 2020 American Physical Society. The microscopic control available over cold atoms in optical lattices has opened new opportunities to study the properties of quantum spin models. While a lot of attention is focused on experimentally realizing ground or thermal states via adiabatic loading, it would often be more straightforward to prepare specific simple product states and to probe the properties of interacting spins by observing their dynamics. We explore this possibility for spin-1/2 and spin-1 models that can be realized with bosons in optical lattices, and which exhibit XY-ferromagnetic (or counterflow spin-superfluid) phases. We consider the dynamics of initial spin-rotated states corresponding to a mean-field version of the phases of interest. Using matrix product state methods in one dimension, we compute both nonequilibrium dynamics and ground and thermal states for these systems. We compare and contrast their behavior in terms of correlation functions and induced spin currents, which should be directly observable with current experimental techniques. We find that although spin correlations decay substantially at large distances and on long timescales, for induction of spin currents, the rotated states behave similarly to the ground states on experimentally observable timescales.

Published
2021

14. Excitation Modes of Bright Matter-Wave Solitons

Author

Di Carli, Andrea, primary, Colquhoun, Craig D., additional, Henderson, Grant, additional, Flannigan, Stuart, additional, Oppo, Gian-Luca, additional, Daley, Andrew J., additional, Kuhr, Stefan, additional, and Haller, Elmar, additional

Published
2019
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