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arXiv 2401.01401cond-mat.stat-mechquant-ph
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多体量子混沌探测提案

Proposal for many-body quantum chaos detection

Adway Kumar Das, Cameron Cianci, Delmar G. A. Cabral, David A. Zarate-Herrada, Patrick Pinney, Saúl Pilatowsky-Cameo, Apollonas S. Matsoukas-Roubeas, Victor S. … 展开作者

Adway Kumar Das, Cameron Cianci, Delmar G. A. Cabral, David A. Zarate-Herrada, Patrick Pinney, Saúl Pilatowsky-Cameo, Apollonas S. Matsoukas-Roubeas, Victor S. Batista, Adolfo del Campo, E. Jonathan Torres-Herrera, Lea F. Santos

AI总结:

本文提出利用生存概率和自旋自相关函数的淬火动力学检测多体量子混沌的谱形状因子相关洞,并给出可在商用量子计算机上实现的浅电路方案。

摘要:

在这项工作中,“量子混沌”一词指的是与随机矩阵理论中发现的谱相关性相似的谱相关性。量子混沌可以通过能级统计的分析来诊断,例如使用谱形状因子,它能检测短程和长程的能级相关性。谱形状因子对应于两点谱相关函数的傅里叶变换,并且在系统混沌时表现出典型的斜率-下降-斜坡-平台结构(也称为相关洞)。我们讨论了如何通过两个可访问的实验多体量子系统的物理量的淬火动力学来检测这种结构:生存概率和自旋自相关函数。生存概率等效于带有额外滤波器的谱形状因子。当系统较小时,相关洞的下降在足够短的时间内达到足够大的值,这些时间短到可以用当前的实验平台检测到。当系统偏离混沌时,相关洞消失,标志着可积性或局域化。我们还提供了一个相对浅的电路,通过该电路可以在商用量子计算机上检测相关洞。

英文摘要:

In this work, the term ``quantum chaos'' refers to spectral correlations similar to those found in the random matrix theory. Quantum chaos can be diagnosed through the analysis of level statistics using e.g.~the spectral form factor, which detects both short- and long-range level correlations. The spectral form factor corresponds to the Fourier transform of the two-point spectral correlation function and exhibits a typical slope-dip-ramp-plateau structure (aka correlation hole) when the system is chaotic. We discuss how this structure could be detected through the quench dynamics of two physical quantities accessible to experimental many-body quantum systems: the survival probability and the spin autocorrelation function. The survival probability is equivalent to the spectral form factor with an additional filter. When the system is small, the dip of the correlation hole reaches sufficiently large values at times which are short enough to be detected with current experimental platforms. As the system is pushed away from chaos, the correlation hole disappears, signaling integrability or localization. We also provide a relatively shallow circuit with which the correlation hole could be detected with commercially available quantum computers.

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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