Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-04-02
J. Phys. A: Math. Theor. 42 (2009) 315003
Physics
Condensed Matter
Statistical Mechanics
IOP style, 9 pages, 1 figure
Scientific paper
Stochastic mass transport models are usually described by specifying hopping rates of particles between sites of a given lattice, and the goal is to predict the existence and properties of the steady state. Here we ask the reverse question: given a stationary state that factorizes over links (pairs of sites) of an arbitrary connected graph, what are possible hopping rates that converge to this state? We define a class of hopping functions which lead to the same steady state and guarantee current conservation but may differ by the induced current strength. For the special case of anisotropic hopping in two dimensions we discuss some aspects of the phase structure. We also show how this case can be traced back to an effective zero-range process in one dimension which is solvable for a large class of hopping functions.
Janke Wolfhard
Meyer-Ortmanns Hildegard
Sopik Julien
Waclaw Bartlomiej
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