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arXiv 1107.2020math-phmath.MPphysics.bio-phq-bio.QM
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无限一维格点上两粒子的反对称排斥过程

An anti-symmetric exclusion process for two particles on an infinite 1D lattice

Jonathan R Potts, Stephen Harris, Luca Giuggioli

摘要:

研究了无限一维晶格上两个有偏的、互斥的随机游动粒子系统,其中一个粒子的内禀偏置与另一个粒子的内禀偏置相等且方向相反。精确求解了该系统的传播子,得到了平均位移和均方位移(MSD)的表达式.根据固有偏置的性质,系统的行为表现出两种状态,其特征在于(i)粒子相互靠近和(ii)粒子相互远离,这两种状态与无偏置的情况有质的不同.连续空间的限制的propagator被发现,并示出解决福克-普朗克方程的两个有偏见的,相互排斥的布朗粒子具有相等和相反的漂移速度。

英文摘要:

A system of two biased, mutually exclusive random walkers on an infinite 1D lattice is studied whereby the intrinsic bias of one particle is equal and opposite to that of the other. The propogator for this system is solved exactly and expressions for the mean displacement and mean square displacement (MSD) are found. Depending on the nature of the intrinsic bias, the system's behaviour displays two regimes, characterised by (i) the particles moving towards each other and (ii) away from each other, both qualitatively different from the case of no bias. The continuous-space limit of the propogator is found and is shown to solve a Fokker-Planck equation for two biased, mutually exclusive Brownian particles with equal and opposite drift velocity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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