Void formation in operator growth, entanglement, and unitarity

Void formation in operator growth, entanglement, and unitarity
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算子生长、纠缠和幺正性中的空洞形成

DOI:
10.1007/jhep03(2021)159
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发表时间:
2019
影响因子:
5.4
通讯作者:
Shreya Vardhan
Shreya Vardhan
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hong Liu;Shreya Vardhan

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海森堡算符演化的结构在解释量子多体系统中的各种过程中起着关键作用。在本文中,我们讨论了一个新的通用功能的运营商的发展:运营商可以开发一个空在其发展过程中,它的非平凡部分成为分离的一个区域的单位经营者。这样的过程存在于可积系统和混沌系统中,并且是么正性所必需的。我们表明,空洞的形成有重要的影响的纠缠增长和互信息和多体纠缠的产生的么正性。我们明确地研究了一些幺正电路模型中空洞形成的概率分布,并推测在量子混沌系统中,该分布是由我们在随机幺正电路中发现的分布给出的,我们称之为随机空洞分布。我们还表明,随机幺正电路导致相同的模式的纠缠增长的多个间隔(1 + 1)维全息CFTs后,全球淬火,这可以用来认为,随机空隙分布导致最大的纠缠增长。
The structure of the Heisenberg evolution of operators plays a key role in explaining diverse processes in quantum many-body systems. In this paper, we discuss a new universal feature of operator evolution: an operator can develop a void during its evolution, where its nontrivial parts become separated by a region of identity operators. Such processes are present in both integrable and chaotic systems, and are required by unitarity. We show that void formation has important implications for unitarity of entanglement growth and generation of mutual information and multipartite entanglement. We study explicitly the probability distributions of void formation in a number of unitary circuit models, and conjecture that in a quantum chaotic system the distribution is given by the one we find in random unitary circuits, which we refer to as the random void distribution. We also show that random unitary circuits lead to the same pattern of entanglement growth for multiple intervals as in (1 + 1)-dimensional holographic CFTs after a global quench, which can be used to argue that the random void distribution leads to maximal entanglement growth.
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