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arXiv 1306.6829cond-mat.stat-mechquant-ph
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张量重整化群中纠缠谱的加倍

Doubling of Entanglement Spectrum in Tensor Renormalization Group

Hiroshi Ueda, Kouichi Okunishi, Tomotoshi Nishino

摘要:

本文研究了HOTRG --张量重整化群(RG)方法结合高阶奇异值分解--对二维经典顶点模型的纠缠谱。在非临界区,它被解释为与RG变换的纠缠谱描述的“加倍”的角落转移矩阵的频谱。然后,我们证明了加倍实际上发生的正方形晶格伊辛模型的HOTRG计算高达$D = 64$,其中$D$是截止尺寸的张量。在临界点处,我们还发现纠缠熵出现了非平凡的$D$标度行为。我们也提到了一维量子系统的HOTRG。

英文摘要:

We investigate the entanglement spectrum in HOTRG ---tensor renormalization group (RG) method combined with the higher order singular value decomposition--- for two-dimensional (2D) classical vertex models. In the off-critical region, it is explained that the entanglement spectrum associated with the RG transformation is described by `doubling' of the spectrum of a corner transfer matrix. We then demonstrate that the doubling actually occurs for the square-lattice Ising model by HOTRG calculations up to $D = 64$, where $D$ is the cut-off dimension of tensors. At the critical point, we also find that a non-trivial $D$ scaling behavior appears in the entanglement entropy. We mention about the HOTRG for the 1D quantum system as well.

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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