Transport in open spin chains: a Monte Carlo wave-function approach
Transport in open spin chains: a Monte Carlo wave-function approach
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DOI：
10.1103/physrevb.77.104303
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发表时间：
2008-03
影响因子：
3.7
通讯作者：
M. Michel;O. Hess;H. Wichterich;J. Gemmer
中科院分区：
文献类型：
--
作者：
M. Michel;O. Hess;H. Wichterich;J. Gemmer
通过直接耦合到不同温度的热浴，我们研究了几个二能级原子或自旋1/2模型中的能量输运。这种分析是在最近导出的量子主方程的基础上进行的，该方程适当地描述了内部弱耦合系统的非平衡性质。对于动力学方程的定态计算，我们采用了蒙特卡罗波函数方法。该分析直接指出了有限模型中的正常扩散或弹道传输，并暗示了无限模型的传输行为的外推。
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.