Effective Langevin equations leading to large deviation function of time-averaged velocity for a nonequilibrium Rayleigh piston

Masato Itami, Yohei Nakayama, Naoko Nakagawa, Shin Ichi Sasa

研究成果: Article査読

抄録

We study fluctuating dynamics of a freely movable piston that separates an infinite cylinder into two regions filled with ideal gas particles at the same pressure but different temperatures. To investigate statistical properties of the time-averaged velocity of the piston in the long-time limit, we perturbatively calculate the large deviation function of the time-averaged velocity. Then, we derive an infinite number of effective Langevin equations yielding the same large deviation function as in the original model. Finally, we provide two possibilities for uniquely determining the form of the effective model.

本文言語English
論文番号022125
ジャーナルPhysical Review E
103
2
DOI
出版ステータスPublished - 2021 2

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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