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arXiv 0906.2869cond-mat.stat-mech
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海盆诱导和动力情景中输运系数的等价性

Equivalence of transport coefficients in bath-induced and dynamical scenarios

Robin Steinigeweg, Marcel Ogiewa, Jochen Gemmer

摘要:

我们研究了一个单一的激发通过一个弱耦合亚基链的运输。链的两端都暴露在浴槽中,浴槽通过Lindblad形式的主方程合并。这个主方程求解使用随机解开,以获得在稳定状态下的激励配置文件和电流。完全扩散运输的模型参数的范围内,而在此范围外观察到的弹道行为的签名。在扩散制度的电导率是相当独立的浴耦合的强度和定量同意的扩散系数已来自同一模型的调查没有浴。此外,在非扩散制度的弹道行为是从这种替代方法的结果一致。

英文摘要:

We investigate the transport of a single excitation through a chain of weakly coupled subunits. At both ends the chain is exposed to baths which are incorporated by means of a master equation in Lindblad form. This master equation is solved by the use of stochastic unraveling in order to obtain excitation profile and current in the steady state. Completely diffusive transport is found for a range of model parameters, whereas signatures of ballistic behavior are observed outside this range. In the diffusive regime the conductivity is rather independent from the strength of the bath coupling and quantitatively agrees with the diffusion coefficient which has been derived from an investigation of the same model without baths. Also the ballistic behavior in the non-diffusive regime is in accord with results from this alternative approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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