Search

Your search keyword '"Carles Altimiras"' showing total 5 results
Start Over Author "Carles Altimiras" Publisher hal ccsd
5 results on '"Carles Altimiras"'

1. Generating Two Continuous Entangled Microwave Beams Using a dc-Biased Josephson Junction

Author

Björn Kubala, Daniel Esteve, Denis Vion, Carles Altimiras, Pérola Milman, M. P. Westig, Gerbold Menard, Göran Johansson, Max Hofheinz, Simon Dambach, Fabien Portier, Y. Mukharsky, A. Peugeot, P. Joyez, Joachim Ankerhold, Patrice Roche, Juha Leppäkangas, Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Joyez, Philippe, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Groupe Nano-Electronique (GNE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universität Ulm - Ulm University [Ulm, Allemagne], Quantronics Group (QUANTRONICS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Karlsruher Institut für Technologie (KIT), Chalmers University of Technology [Gothenburg, Sweden], Institut Quantique [Sherbrooke] (UdeS), and Université de Sherbrooke (UdeS)

Subjects
Josephson effect, Coherence time, QC1-999, General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, Quantum entanglement, Entropy of entanglement, 01 natural sciences, Noise (electronics), Resonator, microwave quantum optics, Quantum mechanics, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), ddc:530, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], ComputingMilieux_MISCELLANEOUS, Physics, Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, superconductivity, 021001 nanoscience & nanotechnology, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], 0210 nano-technology, entanglement, Quantum Physics (quant-ph), DC bias, Coherence (physics)
Abstract

We show experimentally that a dc-biased Josephson junction in series with two microwave resonators emits entangled beams of microwaves leaking out of the resonators. In the absence of a stationary phase reference for characterizing the entanglement of the outgoing beams, we measure second-order coherence functions for proving entanglement up to an emission rate of 2.5 billion photon pairs per second. The experimental results are found in quantitative agreement with theory, proving that the low frequency noise of the dc bias is the main limitation for the coherence time of the entangled beams. This agreement allows us to evaluate the entropy of entanglement of the resonators, and to identify the improvements that could bring this device closer to a useful bright source of entangled microwaves for quantum-technological applications.

Published
2021
Full Text
View/download PDF

2. Antibunched Photons Emitted by a dc-Biased Josephson Junction

Author

Fabien Portier, Patrice Roche, P. Joyez, Simon Dambach, Denis Vion, M. P. Westig, H. le Sueur, Chloé Rolland, Joachim Ankerhold, A. Peugeot, Bjoern Kubala, Daniel Esteve, Y. Mukharsky, Carles Altimiras, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Groupe Nano-Electronique (GNE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universität Ulm - Ulm University [Ulm, Allemagne], Quantronics Group (QUANTRONICS), and ANR-16-CE92-0033,JosePhSCharLi,Du tranpsort électrique quantique à l'optique Quantique: photonique Josephson en régime de couplage fort(2016)

Subjects
Josephson effect, Photon, General Physics and Astronomy, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Correlation function (quantum field theory), 01 natural sciences, Omega, Characteristic impedance, Superconductivity (cond-mat.supr-con), Resonator, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Physics, Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Superconductivity, superconductivity, 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik, coulomb blockade, Order (ring theory), Atomic physics, Quantum Physics (quant-ph), Microwave
Abstract

We show experimentally that a dc biased Josephson junction in series with a high-enough-impedance microwave resonator emits antibunched photons. Our resonator is made of a simple microfabricated spiral coil that resonates at 4.4 GHz and reaches a $1.97\text{ }\text{ }\mathrm{k}\mathrm{\ensuremath{\Omega}}$ characteristic impedance. The second order correlation function of the power leaking out of the resonator drops down to 0.3 at zero delay, which demonstrates the antibunching of the photons emitted by the circuit at a rate of $6\ifmmode\times\else\texttimes\fi{}{10}^{7}$ photons per second. Results are found in quantitative agreement with our theoretical predictions. This simple scheme could offer an efficient and bright single-photon source in the microwave domain.

Published
2019
Full Text
View/download PDF

3. Parametric amplification and squeezing with an ac- and dc-voltage biased superconducting junction

Author

Udson C. Mendes, Sébastien Jezouin, Carles Altimiras, Christophe Mora, Fabien Portier, Philippe Joyez, Bertrand Reulet, Alexandre Blais, Université de Sherbrooke (UdeS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Pierre Aigrain (LPA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Udson C. Mendes, Sébastien Jezouin, Bertrand Reulet and Alexandre Blais were supported by the Canada First Research Excellence Fund and NSERC. Sébastien Jezouin and Bertrand Reulet were supported by Canada Excellence Research Chairs, the Government of Canada, Québec MEIE, Québec FRQNT via INTRIQ, Université de Sherbrooke via EPIQ, and the Canada Foundation for Innovation. The research at CEA Saclay received funding from the European Research Council under the European Unions Horizon 2020 program (European Research Council Grant Agreement No. 639039) and support from the ANR AnPhoTeQ research contract., ANR-12-JS04-0006,AnPhoTEQ,Anti Bunching des Photons émis par un QPC(2012), European Project: 639039,H2020,ERC-2014-STG,NSECPROBE(2015), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Impedance matching, FOS: Physical sciences, General Physics and Astronomy, 02 engineering and technology, 01 natural sciences, Transmission line, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Broadband, Bandwidth (computing), Center frequency, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Parametric statistics, Physics, [PHYS]Physics [physics], Condensed Matter - Mesoscale and Nanoscale Physics, business.industry, 021001 nanoscience & nanotechnology, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Optoelectronics, Parametric oscillator, 0210 nano-technology, business, Microwave
Abstract

We theoretically investigate a near-quantum-limited parametric amplifier based on the nonlinear dynamics of quasiparticles flowing through a superconducting-insulator-superconducting junction. Photon-assisted tunneling, resulting from the combination of dc- and ac-voltage bias, gives rise to a strong parametric interaction for the electromagnetic modes reflected by the junction coupled to a transmission line. We show phase-sensitive and phase-preserving amplification, together with single- and two-mode squeezing. For an aluminum junction pumped at twice the center frequency, $\omega_0/2\pi=6$~GHz, we predict narrow-band phase-sensitive amplification of microwaves signals to more than 20 dB, and broadband phase-preserving amplification of 20 dB over a 1.2 GHz 3-dB bandwidth. We also predict single- and two-mode squeezing reaching more than -12 dB over 5.3 GHz 3-dB bandwidth. Moreover, with a simple impedance matching circuit, we demonstrate 3 dB bandwidth reaching 4.3 GHz for 20 dB of gain. A key feature of the device is that its performance can be controlled in-situ with the applied dc- and ac-voltage biases., Comment: Accepted for publication at the Physical Review Applied. 12 pages and 9 figures

Published
2019
Full Text
View/download PDF

4. Interacting electrodynamics of short coherent conductors in quantum circuits

Author

Fabien Portier, P. Joyez, Carles Altimiras, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), PALM-P2IO NDS-NbSi project, ANR-12-JS04-0006,AnPhoTEQ,Anti Bunching des Photons émis par un QPC(2012), and European Project: 639039,H2020,ERC-2014-STG,NSECPROBE(2015)

Subjects
QC1-999, FOS: Physical sciences, General Physics and Astronomy, Hardware_PERFORMANCEANDRELIABILITY, 02 engineering and technology, 01 natural sciences, Computer Science::Hardware Architecture, Computer Science::Emerging Technologies, Simple (abstract algebra), Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Hardware_INTEGRATEDCIRCUITS, 010306 general physics, Electrical conductor, Quantum, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Electronic circuit, Physics, Condensed Matter - Mesoscale and Nanoscale Physics, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Classical mechanics, ComputerSystemsOrganization_MISCELLANEOUS, Computer Science::Programming Languages, 0210 nano-technology
Abstract

International audience; When combining lumped mesoscopic electronic components to form a circuit, quantum fluctuations of electrical quantities lead to a non-linear electromagnetic interaction between the components that is not generally understood. The Landauer-B\"uttiker formalism that is frequently used to describe non-interacting coherent mesoscopic components is not directly suited to describe such circuits since it assumes perfect voltage bias, i.e. the absence of fluctuations. Here, we show that for short coherent conductors of arbitrary transmission, the Landauer-B\"uttiker formalism can be extended to take into account quantum voltage fluctuations similarly to what is done for tunnel junctions. The electrodynamics of the whole circuit is then formally worked out disregarding the non-Gaussianity of fluctuations. This reveals how the aforementioned non-linear interaction operates in short coherent conductors: voltage fluctuations induce a reduction of conductance through the phenomenon of dynamical Coulomb blockade but they also modify their internal density of states leading to an additional electrostatic modification of the transmission. Using this approach we can account quantitatively for conductance measurements performed on Quantum Point Contacts in series with impedances of the order of $R_K = h / e^2$. Our work should enable a better engineering of quantum circuits with targeted properties.

Published
2016
Full Text
View/download PDF

5. Dynamical Coulomb Blockade of Shot Noise

Author

Patrice Roche, Daniel Esteve, Carles Altimiras, Olivier Parlavecchio, P. Joyez, Denis Vion, Fabien Portier, Groupe Nano-Electronique (GNE), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Quantronics Group (QUANTRONICS), This project was funded by the CNano-IDF Shot-E-Phot and Masquel, the Triangle de la Physique DyCoBloS and ANR AnPhoTeQ grants., and ANR-12-JS04-0006,AnPhoTEQ,Anti Bunching des Photons émis par un QPC(2012)

Subjects
Physics, [PHYS]Physics [physics], Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Shot noise, General Physics and Astronomy, Spectral density, Coulomb blockade, FOS: Physical sciences, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Characteristic impedance, law.invention, SQUID, Resonator, High impedance, law, Tunnel junction, Condensed Matter::Superconductivity, Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Abstract

International audience; We observe the suppression of the finite frequency shot-noise produced by a voltage biased tunnel junction due to its interaction with a single electromagnetic mode of high impedance. The tunnel junction is embedded in a quarter wavelength resonator containing a dense SQUID array providing it with a characteristic impedance in the kOhms range and a resonant frequency tunable in the 4-6 GHz range. Such high impedance gives rise to a sizeable Coulomb blockade on the tunnel junction (roughly 30% reduction in the differential conductance) and allows an efficient measurement of the spectral density of the current fluctuations at the resonator frequency. The observed blockade of shot-noise is found in agreement with an extension of the dynamical Coulomb blockade theory.

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results