Steady Bell State Generation via Magnon-Photon Coupling

Yuan，H. Y.1; Yan，Peng2; Zheng，Shasha3,4,5; He，Q. Y.3,4,5; Xia，Ke6; Yung，Man Hong7,8,9

2020-02-07

10.1103/PhysRevLett.124.053602

Physical review letters   影响因子和分区

10797114

1079-7114

We show that parity-time (PT) symmetry can be spontaneously broken in the recently reported energy level attraction of magnons and cavity photons. In the PT-broken phase, the magnon and photon form a high-fidelity Bell state with maximum entanglement. This entanglement is steady and robust against the perturbation of the environment, which is in contrast to the general wisdom that expects instability of the hybridized state when the symmetry is broken. This anomaly is further understood by the compete of non-Hermitian evolution and particle number conservation of the hybrid system. As a comparison, neither PT-symmetry breaking nor steady magnon-photon entanglement is observed inside the normal level repulsion case. Our results may open an exciting window to utilize magnon-photon entanglement as a resource for quantum information science.

SCI ; EI

英语

ESI高被引 ; NI论文

第一

Economy, Trade and Information Commission of Shenzhen Municipality[201901161512]

Physics

Physics, Multidisciplinary

WOS:000510750600006

American Physical Society

20201008264852

Hybrid systems ; Photons ; Quantum optics

Mathematics:921 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

PHYSICS

2-s2.0-85079792874

Scopus

1.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Electronic Science and Engineering and State Key Laboratory of Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu,610054,China
3.State Key Laboratory for Mesoscopic Physics,School of Physics and Frontiers Science Center for Nano-Optoelectronics,Peking University,100871,China
4.Beijing Academy of Quantum Information Sciences,100193,China
5.Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan,030006,China
6.
7.Institute for Quantum Science and Engineering and Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
8.Shenzhen Key Laboratory of Quantum Science and Engineering,Shenzhen,518055,China
9.Central Research Institute,Huawei Technologies,Shenzhen,518129,China

Yuan，H. Y.,Yan，Peng,Zheng，Shasha,et al. Steady Bell State Generation via Magnon-Photon Coupling[J]. Physical review letters,2020,124(5).

Yuan，H. Y.,Yan，Peng,Zheng，Shasha,He，Q. Y.,Xia，Ke,&Yung，Man Hong.(2020).Steady Bell State Generation via Magnon-Photon Coupling.Physical review letters,124(5).

Yuan，H. Y.,et al."Steady Bell State Generation via Magnon-Photon Coupling".Physical review letters 124.5(2020).