{"title":"Dual opposing quadrature-PT symmetry.","authors":"Wencong Wang, Jacob Kokinda, Jiazhen Li, Qing Gu, Dongmei Liu, Jianming Wen","doi":"10.1016/j.isci.2024.111655","DOIUrl":null,"url":null,"abstract":"<p><p>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.</p>","PeriodicalId":342,"journal":{"name":"iScience","volume":"28 1","pages":"111655"},"PeriodicalIF":4.6000,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11761290/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"iScience","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1016/j.isci.2024.111655","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/17 0:00:00","PubModel":"eCollection","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
我们最近利用开放式双光束系统对 I 型正交奇偶时（PT）对称性进行的研究，不仅能够在朗格文噪声存在的情况下，在相位敏感放大（PSA）和损耗中观察到真正的量子光子 PT 对称性，而且还揭示了噪声波动中额外的经典到量子（C2Q）转换。与之前的设置不同，我们对假定无损耗的另一种系统进行了探索，其中涉及一种仅有 II 型 PSA 的方案。这种方案促进了正交-PT 双反对称性，提供了对 C2Q 转换和 PT 增强量子传感的全面和互补理解，并在对称性未被破坏的区域实现了最佳性能。此外，我们对爱因斯坦-波多尔斯基-罗森标准的量子相关性的研究，揭示了 PT 对称性与非经典性以及连续变量框架内的量子纠缠之间以前未曾探索过的联系。
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.
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