简并参数放大系统的冯诺依曼熵和量子统计特征

IF 3.1 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-09-09 DOI:10.1016/j.physa.2025.130954

Yang Yang , Li-Li Xu , Zong-Zhen Gao , Xiang-Guo Meng

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引用次数: 0

摘要

利用配分函数理论和算子排序法，得到了描述退化参数放大器系统的归一化密度算子，并给出了其理论生成方案。此外，我们分析和数值研究量子统计性质和冯·诺依曼熵。研究发现，信号光的频率可以减弱新态的非经典性和冯·诺依曼熵，而光与介质的相互作用可以增强它们。该工作为量子信息中量子熵的测量和应用提供了理论基础。

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The von Neumann entropy and quantum statistical features of a degenerate parametric amplifier system

Using the theory of partition function and the operator ordering method, we obtain the normalized density operator that describes the degenerate parametric amplifier system, and present its theoretical generation scheme. Also, we analytically and numerically investigate the quantum statistical properties and von Neumann entropy. It is found that the frequency of signal light can weaken the nonclassicality and the von Neumann entropy of the new state, however the interaction between light and medium can enhance them. This work provides a theoretical basis for the measurement and application of quantum entropy in quantum information.

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来源期刊

Physica A: Statistical Mechanics and its Applications 物理-物理：综合

CiteScore

7.20

自引率

9.10%

发文量

852

审稿时长

6.6 months

期刊介绍： Physica A: Statistical Mechanics and its Applications Recognized by the European Physical Society Physica A publishes research in the field of statistical mechanics and its applications. Statistical mechanics sets out to explain the behaviour of macroscopic systems by studying the statistical properties of their microscopic constituents. Applications of the techniques of statistical mechanics are widespread, and include: applications to physical systems such as solids, liquids and gases; applications to chemical and biological systems (colloids, interfaces, complex fluids, polymers and biopolymers, cell physics); and other interdisciplinary applications to for instance biological, economical and sociological systems.