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arXiv 1602.08702cond-mat.stat-mech
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盒子中粒子的随机热力学

Stochastic Thermodynamics of a Particle in a Box

Zongping Gong, Yueheng Lan, H. T. Quan

摘要:

活塞系统(盒子中的粒子)是传统热力学中最简单和最典型的模型。然而,最近建立的随机热力学(ST)的框架不适用于这个模型系统,由于嵌入的奇异性的潜力。本文采用一种新的坐标变换方法研究了盒子中粒子的随机热力学。通过与呼吸谐振子的精确解的比较,得到了线性响应区中任意协议的功分布的解析结果,验证了涨落耗散关系的各种预言.当应用到布朗Szilard发动机模型时,我们得到了最优协议$λ_t = λ_0 2^{t/τ}$对于给定的足够长的总时间$τ$。我们的研究不仅为盒中粒子的时空转换研究建立了一个范式,而且填补了时空转换研究中长期存在的空白。

英文摘要:

The piston system (particles in a box) is the simplest and paradigmatic model in traditional thermodynamics. However, the recently established framework of stochastic thermodynamics (ST) fails to apply to this model system due to the embedded singularity in the potential. In this Letter we study the stochastic thermodynamics of a particle in a box by adopting a novel coordinate transformation technique. Through comparing with the exact solution of a breathing harmonic oscillator, we obtain analytical results of work distribution for an arbitrary protocol in the linear response regime, and verify various predictions of the Fluctuation-Dissipation Relation. When applying to the Brownian Szilard's engine model, we obtain the optimal protocol $λ_t = λ_0 2^{t/τ}$ for a given sufficiently long total time $τ$. Our study not only establishes a paradigm for studying ST of a particle in a box, but also bridges the long-standing gap in the development of ST.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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