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Paneru, Govind
첨단연성물질 연구단
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Transport and Diffusion Enhancement in Experimentally Realized Non-Gaussian Correlated Ratchets

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Title
Transport and Diffusion Enhancement in Experimentally Realized Non-Gaussian Correlated Ratchets
Author(s)
Govind Paneru; Jin Tae Park; Hyuk Kyu Pak
Publication Date
2021-11
Journal
Journal of Physical Chemistry Letters, v.12, no.45, pp.11078 - 11084
Publisher
American Chemical Society
Abstract
© 2021 American Chemical Society.Living cells are known to generate non-Gaussian active fluctuations significantly larger than thermal fluctuations owing to various active processes. Understanding the effect of these active fluctuations on various physicochemical processes, such as the transport of molecular motors, is a fundamental problem in nonequilibrium physics. Therefore, we experimentally and numerically studied an active Brownian ratchet comprising a colloidal particle in an optically generated asymmetric periodic potential driven by non-Gaussian noise having finite-amplitude active bursts, each arriving at random and decaying exponentially. We find that the particle velocity is maximum for relatively sparse bursts with finite correlation time and non-Gaussian distribution. These occasional kicks, which produce Brownian yet non-Gaussian diffusion, are more efficient for transport and diffusion enhancement of the particle than the incessant kicks of active Ornstein-Uhlenbeck noise.
URI
https://pr.ibs.re.kr/handle/8788114/10959
DOI
10.1021/acs.jpclett.1c03037
ISSN
1948-7185
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > 1. Journal Papers (저널논문)
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