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arXiv 1902.02749cond-mat.str-el
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纠缠熵揭示的分形激发

Fractionalized Excitations Revealed by Entanglement Entropy

Wen-Jun Hu, Yi Zhang, Andriy H. Nevidomskyy, Elbio Dagotto, Qimiao Si, Hsin-Hua Lai

摘要:

分数激发在许多不寻常的多体状态中发展,如量子自旋液体,无序相,不能用任何局部序参量描述。由于这些奇异的激发对应于涌现的自由度,如何探测它们并确定它们的存在是一个长期的挑战。我们提出了一个通用的程序来揭示分数激发使用实空间纠缠熵在临界自旋液体,特别是相关的实验。此外,我们还展示了如何利用纠缠熵来构造相应的自旋费米面。我们的工作定义了一个新的途径,建立和表征奇异的激发在新的量子相位的物质。

英文摘要:

Fractionalized excitations develop in many unusual many-body states such as quantum spin liquids, disordered phases that cannot be described using any local order parameter. Because these exotic excitations correspond to emergent degrees of freedom, how to probe them and establish their existence is a long-standing challenge. We present a general procedure to reveal the fractionalized excitations using real-space entanglement entropy in critical spin liquids that are particularly relevant to experiments. Moreover, we show how to use the entanglement entropy to construct the corresponding spinon Fermi surface. Our work defines a new pathway to establish and characterize exotic excitations in novel quantum phases of matter.

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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