Stochastic exclusion processes versus coherent transport

Details Stochastic exclusion processes versus coherent transport Stochastic exclusion processes versus coherent transport

2009-12-04

arxiv.org/abs/0912.0858v2

Physics

Quantum Physics

Scientific paper

Stochastic exclusion processes play an integral role in the physics of non-equilibrium statistical mechanics. These models are Markovian processes, described by a classical master equation. In this paper a quantum mechanical version of a stochastic hopping process in one dimension is formulated in terms of a quantum master equation. This allows the investigation of coherent and stochastic evolution in the same formal framework. The focus lies on the non-equilibrium steady state. Two stochastic model systems are considered, the totally asymmetric exclusion process and the fully symmetric exclusion process. The steady state transport properties of these models is compared to the case with additional coherent evolution, generated by the $XX$-Hamiltonian.

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