arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.0825cond-mat.stat-mechcond-mat.otherquant-ph
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一维纠缠与涨落的一般关系

General Relation between Entanglement and Fluctuations in One Dimension

H. Francis Song, Stephan Rachel, Karyn Le Hur

摘要:

在一维空间中,共形场论的一般结果和对某些量子自旋系统的精确计算,建立了临界系统两部分之间纠缠熵的普遍标度性质。使用分析和数值方法,我们表明,如果粒子数或自旋是保守的,在一个子系统中的波动服从相同的缩放作为子系统大小的函数,这表明波动是一个有用的量,用于确定缩放的纠缠,特别是在更高的维度。我们研究了临界自旋和玻色子链的边界效应和次引导修正。

英文摘要:

In one dimension very general results from conformal field theory and exact calculations for certain quantum spin systems have established universal scaling properties of the entanglement entropy between two parts of a critical system. Using both analytical and numerical methods, we show that if particle number or spin is conserved, fluctuations in a subsystem obey identical scaling as a function of subsystem size, suggesting that fluctuations are a useful quantity for determining the scaling of entanglement, especially in higher dimensions. We investigate the effects of boundaries and subleading corrections for critical spin and bosonic chains.

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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