arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.04796cond-mat.stat-mechmath-phmath.MPquant-ph
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什么是可积淬火?

What is an integrable quench?

Lorenzo Piroli, Balázs Pozsgay, Eric Vernier

摘要:

受可积边界量子场论经典结果的启发,我们提出了格点模型中量子猝灭的可积初态的定义。它们被定义为在空间反射下被所有局域的奇守恒电荷湮灭的态。我们表明,这类包括状态,可以在一个适当的旋转通道,在松散的类比与量子场论的图片可积边界条件。此外,我们提供了一个有效的方法来测试给定的初始状态的可积性。我们重新审视了最近的文献中的几个模型的全球猝灭,并表明,在所有的情况下,可以得到封闭形式的分析结果,初始状态是可积的,根据我们的定义。在XXZ自旋-s链的原型例子中,我们表明,可积态包括两个站点的产品状态,但也有较大的家庭的矩阵产品状态与任意键尺寸。我们认为,我们的结果可能是实际上有用的一般可积模型中的量子猝灭的研究。

英文摘要:

Inspired by classical results in integrable boundary quantum field theory, we propose a definition of integrable initial states for quantum quenches in lattice models. They are defined as the states which are annihilated by all local conserved charges that are odd under space reflection. We show that this class includes the states which can be related to integrable boundary conditions in an appropriate rotated channel, in loose analogy with the picture in quantum field theory. Furthermore, we provide an efficient method to test integrability of given initial states. We revisit the recent literature of global quenches in several models and show that, in all of the cases where closed-form analytical results could be obtained, the initial state is integrable according to our definition. In the prototypical example of the XXZ spin-s chains we show that integrable states include two-site product states but also larger families of matrix product states with arbitrary bond dimension. We argue that our results could be practically useful for the study of quantum quenches in generic integrable models.

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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