Transport in a one-dimensional isotropic Heisenberg model at high temperature
Transport in a one-dimensional isotropic Heisenberg model at high temperature
复制标题
高温下一维各向同性海森堡模型中的输运
DOI：
10.1088/1742-5468/2011/12/p12008
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
M. Znidaric
中科院分区：
文献类型：
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作者：
M. Znidaric
研究了一维各向同性自旋1/2海森堡模型中的磁化输运。结果表明，在高温和恒小驱动的非平衡稳态下，磁化电流依赖于系统长度L为~ 1/L0.5，这意味着扩散常数发散为~ L0.5。讨论了控制非平衡态弛豫的超算子的谱性质。
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 ∼ 1/L0.5, meaning that the diffusion constant diverges as ∼ L0.5. Spectral properties of a superoperator governing the relaxation towards a nonequilibrium steady state are also discussed.