Transport in open spin chains: A Monte Carlo wave-function approach

Details Transport in open spin chains: A Monte Carlo wave-function approach Transport in open spin chains: A Monte Carlo wave-function approach

2008-03-07

arxiv.org/abs/0803.1128v1

Phys. Rev. B 77, 104303 (2008)

Physics

Quantum Physics

to be published in Physical Reviews B

Scientific paper

10.1103/PhysRevB.77.104303

We investigate energy transport in several two-level atom or spin-1/2 models by a direct coupling to heat baths of different temperatures. The analysis is carried out on the basis of a recently derived quantum master equation which describes the nonequilibrium properties of internally weakly coupled systems appropriately. For the computation of the stationary state of the dynamical equations, we employ a Monte Carlo wave-function approach. The analysis directly indicates normal diffusive or ballistic transport in finite models and hints toward an extrapolation of the transport behavior of infinite models.

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