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Title
Molecular dynamics on nonequilibrium motion of a colloidal particle driven by an external torque
Author(s)
유동환권철안정영균
Publication Year
2017-03-10
Abstract
We investigate the motion of a colloidal particle driven out of equilibrium by an external torque. We use molecular dynamics simulation as an alternative to the Langevin dynamics. We prepare a heat bath composed of thousands of particles interacting with each other through the Lennard–Jones potential and impose the Langevin thermostat to maintain the heat bath in equilibrium. We consider a single colloidal particle interacting with with the particles of the heat bath also by the Lennard–Jones potential, without applying any types of dissipative or fluctuating forces used in Langevin dynamics. We set up simulation protocol fit for the overdamped limit as in real experiments, by increasing the size and mass of the colloidal particle. We study nonequilibrium fluctuations for work and heat produced incessantly in time and compare the results with those obtained from the previous studies via the overdamped Langevin dynamics. We confirm the Gallavotti–Cohen symmetry and the fluctuation theorem.
Keyword
Nonequilibrium; Fluctuation theorem; Molecular dynamics
Journal Title
Journal of Physics A: Mathematical and Theoretical
Citation Volume
50
ISSN
1751-8113
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7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14621
http://www.ndsl.kr/ndsl/search/detail/article/articleSearchResultDetail.do?cn=NART77682429
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