Enhancing coherence by local parity-time symmetric operation under the non-Markovian environment

IF 1.2 4区物理与天体物理 Q4 OPTICS

Laser Physics Pub Date : 2024-08-20 DOI:10.1088/1555-6611/ad6d56

Yang Leng

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引用次数: 0

Abstract

The dynamic behavior of the relative entropy of coherence for a two-level system is systematically investigated within non-Markovian environment. We derive the exact expressions of relative entropy quantifying coherence for an exactly solving model consisting of single qubit interacting with independent structured reservoir. By employing local non-Hermitian operation, i.e. parity-time (

) symmetric operation, we show that the vanished quantum coherence can be effectively restored under the non-Markovian regimes. Furthermore, the freezing phenomenon of the coherence can be detected by using the optimal

symmetric operation strength within the non-Markovian environments.

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在非马尔可夫环境下通过局部奇偶时对称运算增强一致性

在非马尔可夫环境中系统地研究了两级系统相干性相对熵的动态行为。我们推导出了一个精确求解模型的相对熵精确表达式，该模型量化了单量子比特与独立结构储层的相干性。通过采用局部非赫米态运算，即奇偶校验-时间（PT）对称运算，我们证明在非马尔可夫机制下可以有效恢复消失的量子相干性。此外，在非马尔可夫环境下，通过使用最佳的 PT 对称操作强度，可以检测到相干性的冻结现象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Laser Physics 物理-光学

CiteScore

2.60

自引率

8.30%

发文量

127

审稿时长

2.2 months

期刊介绍： Laser Physics offers a comprehensive view of theoretical and experimental laser research and applications. Articles cover every aspect of modern laser physics and quantum electronics, emphasizing physical effects in various media (solid, gaseous, liquid) leading to the generation of laser radiation; peculiarities of propagation of laser radiation; problems involving impact of laser radiation on various substances and the emerging physical effects, including coherent ones; the applied use of lasers and laser spectroscopy; the processing and storage of information; and more. The full list of subject areas covered is as follows: -physics of lasers- fibre optics and fibre lasers- quantum optics and quantum information science- ultrafast optics and strong-field physics- nonlinear optics- physics of cold trapped atoms- laser methods in chemistry, biology, medicine and ecology- laser spectroscopy- novel laser materials and lasers- optics of nanomaterials- interaction of laser radiation with matter- laser interaction with solids- photonics