Journal ArticleDOI
Forced thermal ratchets.
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In this paper, the authors considered a Brownian particle in a periodic potential under heavy damping and showed that if the particle is subject to an external force having time correlations, detailed balance is lost and the particle can exhibit a nonzero net drift speed.Abstract:
We consider a Brownian particle in a periodic potential under heavy damping. The second law forbids it from displaying any net drift speed, even if the symmetry of the potential is broken. But if the particle is subject to an external force having time correlations, detailed balance is lost and the particle can exhibit a nonzero net drift speed. Thus, broken symmetry and time correlations are sufficient ingredients for transport.read more
Citations
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Journal ArticleDOI
The Goldbeter-Koshland switch in the first-order region and its response to dynamic disorder.
TL;DR: This work showed that the switching behavior can also occur under comparable concentrations of signals and substrates, provided that the signal molecules catalyze the modification reaction in cooperation, and demonstrated that the system is robust to dynamic disorder at bulk concentration.
Journal ArticleDOI
Efficiency optimization in a correlation ratchet with asymmetric unbiased fluctuations.
Bao-quan Ai,Xian-Ju Wang,Guo-Tao Liu,De-Hua Wen,De-Hua Wen,Hui-Zhang Xie,Wei Chen,Liang-Gang Liu +7 more
TL;DR: It is found that even on the quasistatic limit there is a regime where the efficiency can be a peaked function of temperature, which proves that thermal fluctuations facilitate the efficiency of energy transformation, contradicting the earlier findings.
Posted Content
Synchronized First-Passages in a Double-Well System
TL;DR: In this paper, Langevin dynamic numerical simulation on a double-well potential system subjected to an asymmetric saw-tooth type external time varying field and white noise forces is performed.
Patent
Scodaphoresis and methods and apparatus for moving and concentrating particles
TL;DR: In this paper, an alternating driving field and a mobility-varying field are correlated with one another to move and concentrate DNA or RNA in a medium, for example, to extract particles from one medium into another.
Book ChapterDOI
Motor Proteins as Nanomachines: The Roles of Thermal Fluctuations in Generating Force and Motion
TL;DR: It is argued that kinesin, which has two motor domains or “heads,” walks using a “hand-over-hand” mechanism such that at least one head is bound to the microtubule, and several molecular models for motor proteins are discussed, including so-called ratchet models.
References
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Book
Stochastic processes in physics and chemistry
TL;DR: In this article, the authors introduce the Fokker-planck equation, the Langevin approach, and the diffusion type of the master equation, as well as the statistics of jump events.
Stochastic Processes in Physics and Chemistry
Abstract: Preface to the first edition. Preface to the second edition. Abbreviated references. I. Stochastic variables. II. Random events. III. Stochastic processes. IV. Markov processes. V. The master equation. VI. One-step processes. VII. Chemical reactions. VIII. The Fokker-Planck equation. IX. The Langevin approach. X. The expansion of the master equation. XI. The diffusion type. XII. First-passage problems. XIII. Unstable systems. XIV. Fluctuations in continuous systems. XV. The statistics of jump events. XVI. Stochastic differential equations. XVII. Stochastic behavior of quantum systems.
Book
Molecular Cell Biology
TL;DR: Molecular cell biology, Molecular cell biology , مرکز فناوری اطلاعات و اصاع رسانی, کδاوρزی
Book
The Fokker-Planck Equation: Methods of Solution and Applications
TL;DR: In this paper, the Fokker-Planck Equation for N Variables (FPE) was extended to N = 1 variable and N = 2 variables, where N is the number of variables in the system.