Protecting coherence by weak measurement and quantum measurement reversal

IF 1.2 4区物理与天体物理 Q4 OPTICS

Laser Physics Pub Date : 2024-08-29 DOI:10.1088/1555-6611/ad71b1

Qiong Wang, Zhi He

引用次数: 0

Abstract

The dynamic behavior of the relative entropy of coherence for a two-level system is systematically investigated in different regimes. We derive the exact expressions of relative entropy quantifying coherence for an exactly solving model consisting of single qubit interacting with independent structured reservoir, show explicitly that the weak measurement (WM) and quantum measurement reversal (QMR) operation indeed help for protecting the coherence. In addition, the freezing phenomenon of the coherence can be detected by using the optimal WM and QMR operation.

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通过弱测量和量子测量逆转保护相干性

我们系统地研究了两级系统在不同状态下相干性相对熵的动态行为。我们推导出了由单量子比特与独立结构储层相互作用组成的精确求解模型中量化相干性的相对熵的精确表达式，明确表明弱测量（WM）和量子测量反转（QMR）操作确实有助于保护相干性。此外，通过使用最优的弱测量和量子测量反转操作，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