Symmetry properties of fluctuations in an actively driven rotor

doi:10.1088/1674-1056/ab862b

中国物理B ›› 2020, Vol. 29 ›› Issue (6): 60502-060502.doi: 10.1088/1674-1056/ab862b

所属专题： SPECIAL TOPIC — Active matters physics

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Symmetry properties of fluctuations in an actively driven rotor

He Li(李赫), Xiang Yang(杨翔), Hepeng Zhang(张何朋)

1 School of Physics and Astronomy and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China;
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210023, China

收稿日期:2020-01-15 修回日期:2020-03-16 出版日期:2020-06-05 发布日期:2020-06-05
通讯作者: He Li, Hepeng Zhang E-mail:liheg36ke@gmail.com;hepeng_zhang@sjtu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11422427 and 11402069) and the Program for Professor of Special Appointment at Shanghai Institutions of Higher Learning, China (Grant No. GZ2016004).

Symmetry properties of fluctuations in an actively driven rotor

He Li(李赫)¹, Xiang Yang(杨翔)¹, Hepeng Zhang(张何朋)^1,2

1 School of Physics and Astronomy and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China;
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210023, China

Received:2020-01-15 Revised:2020-03-16 Online:2020-06-05 Published:2020-06-05
Contact: He Li, Hepeng Zhang E-mail:liheg36ke@gmail.com;hepeng_zhang@sjtu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11422427 and 11402069) and the Program for Professor of Special Appointment at Shanghai Institutions of Higher Learning, China (Grant No. GZ2016004).

摘要/Abstract

摘要： We investigate rotational dynamics of an actively driven rotor through experiments and numerical simulations. While probability density distributions of rotor angular velocity are strongly non-Gaussian, relative probabilities of observing rotation in opposite directions are shown to be linearly related to the angular velocity magnitude. We construct a stochastic model to describe transitions between different states from rotor angular velocity data and use the stochastic model to show that symmetry properties in probability density distributions are related to the detailed fluctuation relation (FR) of entropy productions.

关键词: Brownian motor, active bath, fluctuation relation, active matter

Abstract: We investigate rotational dynamics of an actively driven rotor through experiments and numerical simulations. While probability density distributions of rotor angular velocity are strongly non-Gaussian, relative probabilities of observing rotation in opposite directions are shown to be linearly related to the angular velocity magnitude. We construct a stochastic model to describe transitions between different states from rotor angular velocity data and use the stochastic model to show that symmetry properties in probability density distributions are related to the detailed fluctuation relation (FR) of entropy productions.

Key words: Brownian motor, active bath, fluctuation relation, active matter

中图分类号: (Fluctuation phenomena, random processes, noise, and Brownian motion)

05.40.-a

05.60.-k (Transport processes) 05.70.Ln (Nonequilibrium and irreversible thermodynamics)

李赫, 杨翔, 张何朋. Symmetry properties of fluctuations in an actively driven rotor[J]. 中国物理B, 2020, 29(6): 60502-060502.

He Li(李赫), Xiang Yang(杨翔), Hepeng Zhang(张何朋). Symmetry properties of fluctuations in an actively driven rotor[J]. Chin. Phys. B, 2020, 29(6): 60502-060502.

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Symmetry properties of fluctuations in an actively driven rotor

Symmetry properties of fluctuations in an actively driven rotor

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