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arXiv 1802.01154cond-mat.stat-mechcond-mat.str-elhep-th
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自由Dirac理论中的全计数统计

Full counting statistics in the free Dirac theory

Takato Yoshimura

摘要:

本文研究了(3+1)维有质量自由Dirac理论的电荷输运和涨落.特别是,我们专注于稳定状态出现后,本地淬火,两个独立的热化的一半系统连接,让发展统一了很长一段时间。基于两次冯诺依曼测量统计和精确计算,导出了与电荷输运有关的标度累积量母函数。我们发现它可以写成Levitov-Lesovik公式在三维空间中的推广。在无质量的情况下,我们注意到只有前四个标度累积量是非零的。我们的结果也直接证实了在更高的维度扩展的涨落关系的有效性。应用我们的方法Lifshitz费米子也简要讨论。

英文摘要:

We study charge transport and fluctuations of the (3+1)-dimensional massive free Dirac theory. In particular, we focus on the steady state that emerges following a local quench whereby two independently thermalized halves of the system are connected and let to evolve unitarily for a long time. Based on the two-time von Neumann measurement statistics and exact computations, the scaled cumulant generating function associated with the charge transport is derived. We find that it can be written as a generalization of Levitov-Lesovik formula to the case in three spatial dimensions. In the massless case, we note that only the first four scaled cumulants are nonzero. Our results provide also a direct confirmation for the validity of the extended fluctuation relation in higher dimensions. An application of our approach to Lifshitz fermions is also briefly discussed.

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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