arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2402.04641cond-mat.str-el
收藏

低激发态量子纠缠与连续量子相变:一维去禁闭临界点的临界性

Low-lying excited states quantum entanglement and continuous quantum phase transitions: The criticality of a one-dimensional deconfined critical point

Yan-Chao Li, Yuan-Hang Zhou, Yuan Zhang, Hai-Qing Lin

AI总结:

本研究通过低激发态的纠缠熵和保真度,确定了一维量子自旋链中去禁闭临界点的精确位置和连续性,并揭示了其与别列津斯基-科斯特利茨-索利斯型相变的本质区别。

摘要:

从低激发态的角度出发,我们利用纠缠熵和保真度研究了一维量子自旋链中的去禁闭量子临界点(DQCP)。我们的结果表明,低激发谱的重构与DQCP之间存在密切联系。临界点的精确位置及其连续性由第一激发态的纠缠和保真度的奇异行为所指示。此外,与同样超越朗道-金兹堡-威尔逊范式的别列津斯基-科斯特利茨-索利斯型相变相比,我们试图从纠缠奇异性的不同表现揭示DQPT两侧不同类型对称性的本质。

英文摘要:

From the perspective of low-lying excited states, we study the deconfined quantum critical point (DQCP) in a one-dimensional quantum spin chain by means of the entanglement entropy and fidelity. Our results show that there is a close connection between the reconstruction of low-lying excitation spectra and the DQCP. The precise position of the critical point and its continuous nature is indicated by the singular behavior of the entanglement and fidelity of the first-excited state. Furthermore, compared with the Berezinskii-Kosterlitz-Thouless type phase transitions, which also go beyond the scope of Landau-Ginzburg-Wilson paradigm, we attempt to reveal the essence of different types of symmetries on both sides of the DQPT from different manifestations of entanglement singularity.

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。

↑