Transport in a one-dimensional isotropic Heisenberg model at high temperature
Por:
Znidaric, M
Publicada:
1 dic 2011
Resumen:
Magnetization transport in a one-dimensional isotropic spin 1/2 Heisenberg model is studied. It is shown that in a nonequilibrium steady state at high temperature and constant small driving the magnetization current depends on the system length L as similar to 1/L-0.5, meaning that the diffusion constant diverges as similar to L-0.5. Spectral properties of a superoperator governing the relaxation towards a nonequilibrium steady state are also discussed.
Filiaciones:
Znidaric, M:
Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62191, Morelos, Mexico
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