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
Models of bacteriophage DNA packaging motors.
TL;DR: The motor-ratchet hypothesis also explains the current data, including data in the following categories: biochemical genetics, energetics, structure, and packaging dynamics.
Journal ArticleDOI
Zero-dispersion phenomena in oscillatory systems
TL;DR: Zero-dispersion (ZD) systems are those whose frequency of oscillation ω possesses an extremum as a function of energy E, where the frequency dispersion dω/dE is equal to zero.
Journal ArticleDOI
Ratchet effect in dc SQUIDs
TL;DR: In this paper, the authors analyzed voltage rectification for dc SQUIDs biased with ac current with zero mean value and demonstrated that the reflection symmetry in the 2-dimensional SQUID potential is broken by an applied flux and with appropriate asymmetries in the dc SQUID, and obtained a rocking or simultaneously rocking and flashing ratchet, the latter showing multiple sign reversals in the mean voltage with increasing amplitude of the ac current.
Journal ArticleDOI
Two-Locus Epistasis With Sexually Antagonistic Selection: A Genetic Parrondo's Paradox
TL;DR: An example is provided where, with antagonistic selection and epistatic interaction of alleles at two loci, an autosomal allele can rise in frequency, persist in the population, and even continue to fixation, despite having an apparently lower average fitness than the alternative allele.
Journal ArticleDOI
Performance characteristics of an irreversible thermally driven Brownian microscopic heat engine
Yi Zhang,Bihong Lin,Jincan Chen +2 more
TL;DR: In this paper, a Brownian heat engine with a spatially asymmetric but periodic potential (ratchet), with an external load force and connected to an alternating hot and cold reservoir, is modeled as a microscopic heat engine.
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.