Void formation in operator growth, entanglement, and unitarity
Void formation in operator growth, entanglement, and unitarity
复制标题
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
中科院分区:
文献类型:
--
作者:
Hong Liu;Shreya Vardhan
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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影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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影响因子:
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作者:
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DOI:
--
发表时间:
2022
期刊:
Symposium on Algorithmic Principles of Computer Systems
影响因子:
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作者:
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通讯作者:
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DOI:
10.48550/arxiv.1803.00089
发表时间:
2018
期刊:
arXiv e-prints
影响因子:
--
作者:
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通讯作者:
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