Shock formation in an exclusion process with creation and annihilation
arXiv:cond-mat/0303484 · doi:10.1103/PhysRevE.68.026117
Abstract
We investigate shock formation in an asymmetric exclusion process with creation and annihilation of particles in the bulk. We show how the continuum mean-field equations can be studied analytically and hence derive the phase diagrams of the model. In the large system-size limit direct simulations of the model show that the stationary state is correctly described by the mean-field equations, thus the predicted mean field phase diagrams are expected to be exact. The emergence of shocks and the structure of the phase diagram are discussed. We also analyse the fluctuations of the shock position by using a phenomenological random walk picture of the shock dynamics. The stationary distribution of shock positions is calculated, by virtue of which the numerically determined finite-size scaling behaviour of the shock width is explained.
18 pages, 11 figures, revised version
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