S. Goldstein et Er. Speer, REFLECTION INVARIANCE OF THE CURRENT IN THE TOTALLY ASYMMETRIC SIMPLEEXCLUSION PROCESS WITH DISORDER, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 58(4), 1998, pp. 4226-4228
We show that for the totally asymmetric simple exclusion process on a
ring, with arbitrary choice of hopping rates across different bonds of
the system, the current is independent of the direction of the jumps.
[S1063-651X(98)00710-7].