Fluctuation-response relation of many Brownian particles under nonequilibrium conditions

Takenobu Nakamura, Shin Ichi Sasa

    研究成果: Article査読

    11 被引用数 (Scopus)

    抄録

    We study many interacting Brownian particles under a tilted periodic potential. We numerically measure the linear response coefficient of the density field by applying a slowly varying potential transversal to the tilted direction. In equilibrium cases, the linear response coefficient is related to the intensity of density fluctuations in a universal manner, which is called a fluctuation-response relation. We then report numerical evidence that this relation holds even in nonequilibrium cases. This result suggests that Einstein's formula on density fluctuations can be extended to driven diffusive systems when the slowly varying potential is applied in a direction transversal to the driving force.

    本文言語English
    論文番号021108
    ジャーナルPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
    77
    2
    DOI
    出版ステータスPublished - 2008 2月 8

    ASJC Scopus subject areas

    • 統計物理学および非線形物理学
    • 統計学および確率
    • 凝縮系物理学

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