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

Autor(en): Michel, Mathias
Hess, Ortwin
Wichterich, Hannu
Gemmer, Jochen 
Stichwörter: FOURIERS LAW; HEAT-TRANSPORT; LIOUVILLE SPACE; MASTER-EQUATIONS; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Applied; Physics, Condensed Matter; SMALL QUANTUM-SYSTEMS; THERMAL-CONDUCTIVITY
Erscheinungsdatum: 2008
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW B
Volumen: 77
Ausgabe: 10
Zusammenfassung: 
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 wavefunction 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.
ISSN: 24699950
DOI: 10.1103/PhysRevB.77.104303

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