arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.04693quant-ph
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具有厄米特端点的非厄米特演化中的功统计

Work statistics in non-Hermitian evolutions with Hermitian endpoints

Zheng-Yang Zhou, Ze-Liang Xiang J. Q. You, Franco Nori

摘要:

具有特定形式的哈密顿量的非厄米系统可以表现出新颖的现象。然而,研究它们的量子化学性质是困难的。特别是,在非厄米特系统中,由于状态范数的变化,工作统计的计算可能具有挑战性。为了解决这个问题,我们修改了厄米系统中的两点测量方法。改进后的方法可以应用于非厄米系统,即厄米系统在演化之前和之后都是厄米系统。在厄米特系统中,我们的方法等价于两点测量方法。当系统是非厄米特的,我们的结果表示在一个更大的厄米特系统的统计投影。作为一个例子,我们计算了非Hermitian的Su-Schrieffer-Heeger模型中的功统计。我们的结果揭示了非厄米系统和厄米系统的功统计之间的一些差异。

英文摘要:

Non-Hermitian systems with specific forms of Hamiltonians can exhibit novel phenomena. However, it is difficult to study their quantum thermodynamical properties. In particular, the calculation of work statistics can be challenging in non-Hermitian systems due to the change of state norm. To tackle this problem, we modify the two-point measurement method in Hermitian systems. The modified method can be applied to non-Hermitian systems which are Hermitian before and after the evolution. In Hermitian systems, our method is equivalent to the two-point measurement method. When the system is non-Hermitian, our results represent a projection of the statistics in a larger Hermitian system. As an example, we calculate the work statistics in a non-Hermitian Su-Schrieffer-Heeger model. Our results reveal several differences between the work statistics in non-Hermitian systems and the one in Hermitian systems.

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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