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Special Issue:
SPECIAL TOPIC — Active matters physics
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| SPECIAL TOPIC—Active matters physics |
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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 |
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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.
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Received: 15 January 2020
Revised: 16 March 2020
Accepted manuscript online:
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PACS:
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05.40.-a
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(Fluctuation phenomena, random processes, noise, and Brownian motion)
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05.60.-k
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(Transport processes)
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05.70.Ln
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(Nonequilibrium and irreversible thermodynamics)
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| Fund: 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). |
Corresponding Authors:
He Li, Hepeng Zhang
E-mail: liheg36ke@gmail.com;hepeng_zhang@sjtu.edu.cn
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Cite this article:
He Li(李赫), Xiang Yang(杨翔), Hepeng Zhang(张何朋) Symmetry properties of fluctuations in an actively driven rotor 2020 Chin. Phys. B 29 060502
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