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ファイル | 記述 | サイズ | フォーマット | |
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PhysRevLett.114.090601.pdf | 740.3 kB | Adobe PDF | 見る/開く |
タイトル: | Minimal Model of Stochastic Athermal Systems: Origin of Non-Gaussian Noise |
著者: | Kanazawa, Kiyoshi ![]() ![]() ![]() Sano, Tomohiko G. Sagawa, Takahiro Hayakawa, Hisao ![]() ![]() ![]() |
著者名の別形: | 金澤, 輝代士 |
発行日: | 3-Mar-2015 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review Letters |
巻: | 114 |
号: | 9 |
論文番号: | 090601 |
抄録: | For a wide class of stochastic athermal systems, we derive Langevin-like equations driven by non-Gaussian noise, starting from master equations and developing a new asymptotic expansion. We found an explicit condition whereby the non-Gaussian properties of the athermal noise become dominant for tracer particles associated with both thermal and athermal environments. Furthermore, we derive an inverse formula to infer microscopic properties of the athermal bath from the statistics of the tracer particle. We apply our formulation to a granular motor under viscous friction and analytically obtain the angular velocity distribution function. Our theory demonstrates that the non-Gaussian Langevin equation is the minimal model of athermal systems. |
著作権等: | © 2015 American Physical Society |
URI: | http://hdl.handle.net/2433/198650 |
DOI(出版社版): | 10.1103/PhysRevLett.114.090601 |
PubMed ID: | 25793791 |
出現コレクション: | 学術雑誌掲載論文等 |
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