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arXiv 2501.04795cond-mat.stat-mechcond-mat.str-elhep-thmath-phmath.MPquant-ph
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准周期驱动量子临界系统中的相变:解析结果

Phase Transitions in Quasi-Periodically Driven Quantum Critical Systems: Analytical Results

Jiyuan Fang, Qi Zhou, Xueda Wen

AI总结:

本文解析研究了准周期驱动一维量子临界系统中的相变,通过将准周期性引入驱动哈密顿量并运用Avila全局理论,解析得到了加热相、非加热相、相图及决定纠缠熵演化的Lyapunov指数,并证明了先前设置中不存在相变。

摘要:

在这项工作中,我们解析地研究了由共形场论(CFTs)描述的准周期驱动一维量子临界系统中的相变。通过使用Avila在单频准周期上循环余圈中的全局理论,可以解析地得到相图和相变。与先前将准周期性引入驱动时间且未观察到相变的工作[1]相比,我们在此提出了一种将准周期性引入驱动哈密顿量的设置。在我们的设置中,可以观察到加热相、非加热相以及相变。相图以及决定纠缠熵演化的Lyapunov指数都可以解析地得到。此外,基于Avila的理论,我们证明了先前提出的准周期驱动CFTs设置[1]中不存在相变。我们通过研究晶格模型上纠缠熵的时间演化来验证我们的场论结果。

英文摘要:

In this work, we study analytically the phase transitions in quasi-periodically driven one dimensional quantum critical systems that are described by conformal field theories (CFTs). The phase diagrams and phase transitions can be analytically obtained by using Avila's global theory in one-frequency quasiperiodic cocycles. Compared to the previous works where the quasiperiodicity was introduced in the driving time and no phase transitions were observed [1], here we propose a setup where the quasiperiodicity is introduced in the driving Hamiltonians. In our setup, one can observe the heating phases, non-heating phases, and the phase transitions. The phase diagram as well as the Lyapunov exponents that determine the entanglement entropy evolution can be analytically obtained. In addition, based on Avila's theory, we prove there is no phase transition in the previously proposed setup of quasi-periodically driven CFTs [1]. We verify our field theory results by studying the time evolution of entanglement entropy on lattice 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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