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

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

2011-07-11

arxiv.org/abs/1107.2020v2

J. Phys. A: Math. Theor. 44 (2011) 485003

Physics

Mathematical Physics

19 pages, 5 figures

Scientific paper

10.1088/1751-8113/44/48/485003

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.

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