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Kimchi-Schwartz ME, Martin L, Flurin E, Aron C, Kulkarni M, Tureci HE, Siddiqi I. Stabilizing Entanglement via Symmetry-Selective Bath Engineering in Superconducting Qubits. Phys Rev Lett 2016; 116:240503. [PMID: 27367372 DOI: 10.1103/physrevlett.116.240503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Indexed: 06/06/2023]
Abstract
Bath engineering, which utilizes coupling to lossy modes in a quantum system to generate nontrivial steady states, is a tantalizing alternative to gate- and measurement-based quantum science. Here, we demonstrate dissipative stabilization of entanglement between two superconducting transmon qubits in a symmetry-selective manner. We utilize the engineered symmetries of the dissipative environment to stabilize a target Bell state; we further demonstrate suppression of the Bell state of opposite symmetry due to parity selection rules. This implementation is resource efficient, achieves a steady-state fidelity F=0.70, and is scalable to multiple qubits.
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Affiliation(s)
- M E Kimchi-Schwartz
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA
| | - L Martin
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA
| | - E Flurin
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA
| | - C Aron
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
- Laboratoire de Physique Théorique, École Normale Supérieure, CNRS, Paris, France
- Instituut voor Theoretische Fysica, KU Leuven, Belgium
| | - M Kulkarni
- Department of Physics, New York City College of Technology, The City University of New York, Brooklyn, New York 11201, USA
| | - H E Tureci
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - I Siddiqi
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA
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Carusotto I, Gerace D, Tureci HE, De Liberato S, Ciuti C, Imamoglu A. Fermionized photons in an array of driven dissipative nonlinear cavities. Phys Rev Lett 2009; 103:033601. [PMID: 19659277 DOI: 10.1103/physrevlett.103.033601] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Indexed: 05/28/2023]
Abstract
We theoretically investigate the optical response of a one-dimensional array of strongly nonlinear optical microcavities. When the optical nonlinearity is much larger than both losses and intercavity tunnel coupling, the nonequilibrium steady state of the system is reminiscent of a strongly correlated Tonks-Girardeau gas of impenetrable bosons. Signatures of strong correlations are identified in the transmission spectrum of the system, as well as in the intensity correlations of the transmitted light. Possible experimental implementations in state-of-the-art solid-state devices are discussed.
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Affiliation(s)
- I Carusotto
- BEC-CNR-INFM and Dipartimento di Fisica, Università di Trento, I-38050 Povo, Italy
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Rex NB, Tureci HE, Schwefel HGL, Chang RK, Stone AD. Fresnel filtering in lasing emission from scarred modes of wave-chaotic optical resonators. Phys Rev Lett 2002; 88:094102. [PMID: 11864011 DOI: 10.1103/physrevlett.88.094102] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2001] [Indexed: 05/23/2023]
Abstract
We study lasing emission from asymmetric resonant cavity GaN microlasers. By comparing far-field intensity patterns with images of the microlaser we find that the lasing modes are concentrated on three-bounce unstable periodic ray orbits; i.e., the modes are scarred. The high-intensity emission directions of these scarred modes are completely different from those predicted by applying Snell's law to the ray orbit. This effect is due to the process of "Fresnel filtering" which occurs when a beam of finite angular spread is incident at the critical angle for total internal reflection.
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Affiliation(s)
- N B Rex
- Department of Applied Physics, P.O. Box 208284, Yale University, New Haven, CT 06520-8284, USA
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Tureci HE, Stone AD. Deviation from Snell's law for beams transmitted near the critical angle: application to microcavity lasers. Opt Lett 2002; 27:7-9. [PMID: 18007698 DOI: 10.1364/ol.27.000007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We show that when a narrow beam is incident upon a dielectric interface near the critical angle for total internal reflection it will be transmitted into the far field with an angular deflection from the direction predicted by Snell's law, because of a phenomenon that we call "Fresnel filtering." This effect can be quite large for the parameter range that is relevant to dielectric microcavity lasers.
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