Exact matrix-product states for parallel dynamics: Open boundaries and excess mass on the ring

Details Exact matrix-product states for parallel dynamics: Open boundaries and excess mass on the ring Exact matrix-product states for parallel dynamics: Open boundaries and excess mass on the ring

2009-03-31

arxiv.org/abs/0903.5447v1

Physics

Condensed Matter

Statistical Mechanics

21 pages, 4 figures

Scientific paper

In this paper it is shown that the steady-state weights of the asymmetric simple exclusion process (ASEP) with open boundaries and parallel update can be written as a product of a scalar pair-factorized and a matrix-product state. This type of state is also obtained for an ASEP on a ring in which particles can move one or two sites. The dynamics leads to the formation of an excess hole that plays the role of a defect. We expect the process to play a similar role for parallel dynamics as the well-known ASEP with a single defect-particle (that is obtained in the continuous-time limit) especially for the study of shocks. The process exhibits a first-order phase transition between two phases with different defect velocities. These are calculated exactly from the process-generating function.

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