Real-time simulation of nonequilibrium transport of magnetization in large open quantum spin systems driven by dissipation

D. Banerjee, F. Hebenstreit, F. J. Jiang, U. J. Wiese

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Abstract

Using quantum Monte Carlo, we study the nonequilibrium transport of magnetization in large open strongly correlated quantum spin-12 systems driven by purely dissipative processes that conserve the uniform or staggered magnetization, disregarding unitary Hamiltonian dynamics. We prepare both a low-temperature Heisenberg ferromagnet and an antiferromagnet in two parts of the system that are initially isolated from each other. We then bring the two subsystems in contact and study their real-time dissipative dynamics for different geometries. The flow of the uniform or staggered magnetization from one part of the system to the other is described by a diffusion equation that can be derived analytically.

Original languageEnglish
Article number121104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number12
DOIs
Publication statusPublished - 2015 Sep 10

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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