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arXiv 0808.0993cond-mat.stat-mech
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非平衡系统中泛超涨落的指示

Indications of Universal Excess Fluctuations in Nonequilibrium Systems

Tatsuro Yuge, Akira Shimizu

摘要:

用分子动力学模拟研究了宏观均匀导体非平衡稳态下电流的涨落。在低频,将电流的光谱强度适当分解为热和过量波动提供了表现为散粒噪声的过量波动的简单图像。这表明,波动耗散关系可能会违反在一个普遍的方式出现的散粒噪声的粒子或动量传输的系统范围很广。

英文摘要:

The fluctuation in electric current in nonequilibrium steady states is investigated by molecular dynamics simulation of macroscopically uniform conductors. At low frequencies, appropriate decomposition of the spectral intensity of current into thermal and excess fluctuations provides a simple picture of excess fluctuations behaving as shot noise. This indicates that the fluctuation-dissipation relation may be violated in a universal manner by the appearance of shot noise for a wide range of systems with particle or momentum transport.

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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