用马尔可夫反馈控制的双量子点量子电池

IF 2.8 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physica A: Statistical Mechanics and its Applications Pub Date : 2024-10-11 DOI:10.1016/j.physa.2024.130153

Oscar Bohórquez

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引用次数: 0

摘要

电池是一种以功的形式储存能量供其他设备以后使用的装置。在这项工作中，我们研究了在双量子点串联中实现量子电池的问题，双量子点由处于不同化学势的两个电极充电，并通过马尔可夫量子反馈协议进行优化。利用各向异性的概念，我们首先建立了两级系统中最大各向异性的简单表达式，然后找到了马尔可夫反馈能够实现最佳各向异性的参数。我们发现量子相干可以作为一种能量存储资源，并研究了与声子环境相互作用的影响，通过微调系统参数来减轻与环境的放电过程。

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A double quantum dot quantum battery controlled with a Markovian feedback

A battery is a device that stores energy in the form of work for later use by other devices. In this work, we study the realization of a quantum battery in a double quantum dot in series, charged by two electrodes at different chemical potentials and optimized by a Markovian quantum feedback protocol. Using the concept of ergotropy as a figure of merit, we first establish a simple expression for the maximum ergotropy in a two-level system, and then find the parameters under which Markovian feedback can achieve this optimal ergotropy. We find that quantum coherence can be used as an energy storage resource, and we study the influence of interactions with a phonon environment to mitigate the discharge process with the environment by fine-tuning the system parameters.

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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.