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Non-equilibrium stationary state of a two-temperature spin chain

MPG-Autoren
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Schmüser,  F.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Zitation

Schmüser, F., & Schmittmann, B. (2002). Non-equilibrium stationary state of a two-temperature spin chain. Journal of Physics A-Mathematical and General, 35(11), 2569-2580. Retrieved from http://www.iop.org/EJ/abstract/0305-4470/35/11/304.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002B-37D6-F
Zusammenfassung
A kinetic one-dimensional Ising model is coupled to two heat baths, such that spins at even (odd) lattice sites experience a temperature T-e (T-o). Spin-flips occur with Glauber-type rates generalized to the case of two temperatures. Driven by the temperature differential, the spin chain settles into a nonequilibrium steady state which corresponds to the stationary solution of a master equation. We construct a perturbation expansion of this master equation in terms of the temperature difference and compute explicitly the first two corrections to the equilibrium Boltzmann distribution. The key result is the emergence of additional spin operators in the steady state, increasing in spatial range and order of spin products. We comment on the violation of detailed balance and entropy production in the steady state.