Quantum manipulation of asymmetric Einstein-Podolsky-Rosen steering in controllable dynamical Casimir arrays

doi:10.1088/1674-1056/ad9a99

中国物理B ›› 2025, Vol. 34 ›› Issue (2): 20307-020307.doi: 10.1088/1674-1056/ad9a99

Quantum manipulation of asymmetric Einstein-Podolsky-Rosen steering in controllable dynamical Casimir arrays

Ruinian Li(李瑞年), Yumei Long(龙玉梅)†, and Xue Zhang(张雪)‡

Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China

收稿日期:2024-09-14 修回日期:2024-11-18 接受日期:2024-12-05 出版日期:2025-02-15 发布日期:2025-01-15
通讯作者: Yumei Long, Xue Zhang E-mail:longym158@nenu.edu.cn;zhangx800@nenu.edu.cn
基金资助:
Project supported by the Education Department of Jilin Province, China (Grant No. JJKH20231291KJ).

Quantum manipulation of asymmetric Einstein-Podolsky-Rosen steering in controllable dynamical Casimir arrays

Ruinian Li(李瑞年), Yumei Long(龙玉梅)†, and Xue Zhang(张雪)‡

Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China

Received:2024-09-14 Revised:2024-11-18 Accepted:2024-12-05 Online:2025-02-15 Published:2025-01-15
Contact: Yumei Long, Xue Zhang E-mail:longym158@nenu.edu.cn;zhangx800@nenu.edu.cn
Supported by:
Project supported by the Education Department of Jilin Province, China (Grant No. JJKH20231291KJ).

摘要/Abstract

摘要： We design dynamical Casimir arrays (DCA) consisting of giant atoms and coupled resonator waveguides (CRWs) to investigate the Einstein-Podolsky-Rosen (EPR) steering at finite temperatures. Our designed system exhibits an asymmetry in its structure, which is caused by the differences in the sizes and the coupling positions of the giant atoms. The system achieves different types of EPR steering and the reversal of one-way EPR steering by modulating parameters. Furthermore, the symmetry and asymmetry of the system structure, in their responses to parameter modulation, both reveal the asymmetry of EPR steering. In this process, we discover that with the increase in temperature, different types of steering can be transferred from Casimir photons to giant atoms. We also achieve the monogamy of the multipartite system. These results provide important assistance for secure quantum communication, and further intuitively validating the asymmetry of EPR steering from multiple perspectives.

关键词: dynamical Casimir effect, EPR steering, monogamy relation, giant atoms, coupled resonator waveguides

Abstract: We design dynamical Casimir arrays (DCA) consisting of giant atoms and coupled resonator waveguides (CRWs) to investigate the Einstein-Podolsky-Rosen (EPR) steering at finite temperatures. Our designed system exhibits an asymmetry in its structure, which is caused by the differences in the sizes and the coupling positions of the giant atoms. The system achieves different types of EPR steering and the reversal of one-way EPR steering by modulating parameters. Furthermore, the symmetry and asymmetry of the system structure, in their responses to parameter modulation, both reveal the asymmetry of EPR steering. In this process, we discover that with the increase in temperature, different types of steering can be transferred from Casimir photons to giant atoms. We also achieve the monogamy of the multipartite system. These results provide important assistance for secure quantum communication, and further intuitively validating the asymmetry of EPR steering from multiple perspectives.

Key words: dynamical Casimir effect, EPR steering, monogamy relation, giant atoms, coupled resonator waveguides

中图分类号: (Quantum communication)

03.67.Hk

03.67.Dd (Quantum cryptography and communication security) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)

Ruinian Li(李瑞年), Yumei Long(龙玉梅), and Xue Zhang(张雪). Quantum manipulation of asymmetric Einstein-Podolsky-Rosen steering in controllable dynamical Casimir arrays[J]. 中国物理B, 2025, 34(2): 20307-020307.

Ruinian Li(李瑞年), Yumei Long(龙玉梅), and Xue Zhang(张雪). Quantum manipulation of asymmetric Einstein-Podolsky-Rosen steering in controllable dynamical Casimir arrays[J]. Chin. Phys. B, 2025, 34(2): 20307-020307.

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Quantum manipulation of asymmetric Einstein-Podolsky-Rosen steering in controllable dynamical Casimir arrays

Quantum manipulation of asymmetric Einstein-Podolsky-Rosen steering in controllable dynamical Casimir arrays

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