双反对易四元数-宇称-时间对称性

Dual opposing quadrature-PT symmetry.

作者信息

Wang Wencong, Kokinda Jacob, Li Jiazhen, Gu Qing, Liu Dongmei, Wen Jianming

机构信息

Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China.

Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27695, USA.

出版信息

iScience. 2024 Dec 25;28(1):111655. doi: 10.1016/j.isci.2024.111655. eCollection 2025 Jan 17.

DOI:10.1016/j.isci.2024.111655

PMID:39868051

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11761290/

Abstract

Our recent research on type-I quadrature parity-time (PT) symmetry, utilizing an open twin-beam system, not only enables observing genuine quantum photonic PT symmetry amid phase-sensitive amplification (PSA) and loss in the presence of Langevin noise but also reveals an additional classical-to-quantum (C2Q) transition in noise fluctuations. In contrast to the previous setup, our exploration of an alternative system assuming no loss involves a type-II PSA-only scheme. This scheme facilitates dual opposing quadrature-PT symmetry, offering a comprehensive and complementary comprehension of C2Q transitions and PT-enhanced quantum sensing with optimal performance in the symmetry unbroken region. Furthermore, our investigation into the quantum correlation with the Einstein-Podolsky-Rosen criteria uncovers previously unexplored connections between PT symmetry and nonclassicality, as well as quantum entanglement within the continuous-variable framework.

摘要

我们最近利用开放双光束系统对I型正交宇称时间（PT）对称性进行的研究，不仅能够在存在朗之万噪声的情况下，在相位敏感放大（PSA）和损耗过程中观察到真正的量子光子PT对称性，还揭示了噪声涨落中额外的经典到量子（C2Q）转变。与之前的设置不同，我们对无损耗替代系统的探索涉及仅II型PSA方案。该方案促进了双反对称正交PT对称性，在对称未破缺区域提供了对C2Q转变和PT增强量子传感的全面且互补的理解，并具有最佳性能。此外，我们根据爱因斯坦-波多尔斯基-罗森准则对量子关联的研究揭示了PT对称性与非经典性之间以及连续变量框架内量子纠缠之间以前未被探索的联系。