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arXiv 1504.00237cond-mat.stat-mechquant-ph
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利用链阵列矩阵乘积态实现二维量子猝灭

Quantum quenches in two spatial dimensions using chain array matrix product states

A. J. A. James, R. M. Konik

摘要:

我们描述了一种在二维空间中模拟扩展量子系统实时演化的方法。该方法结合了一维可积性和矩阵乘积状态的优点,以避免阻碍2D中基于张量的方法的其他应用的几个问题。特别是它可以扩展到无限长的圆柱体。作为一个应用实例,我们提出了量子猝灭的二维量子(2+1维)伊辛模型的结果。在猝灭跨越相边界,我们发现,返回概率显示非解析的时间。

英文摘要:

We describe a method for simulating the real time evolution of extended quantum systems in two dimensions. The method combines the benefits of integrability and matrix product states in one dimension to avoid several issues that hinder other applications of tensor based methods in 2D. In particular it can be extended to infinitely long cylinders. As an example application we present results for quantum quenches in the 2D quantum (2+1 dimensional) Ising model. In quenches that cross a phase boundary we find that the return probability shows non-analyticities in time.

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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