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arXiv 1608.04744hep-thcond-mat.stat-mechgr-qc
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零模与纠缠熵

Zero Modes and Entanglement Entropy

Yasaman K. Yazdi

摘要:

紫外发散在纠缠熵的研究中被广泛讨论。在场论中,由于零模而引起的红外发散也存在,但了解得少得多。本文讨论了在纠缠熵中小心处理零模的重要性。我们给出了一个明确的例子,在一维谐振子链,质量调节器是必要的,以避免由于零模式的红外发散。我们还评论了一个令人惊讶的贡献的零模式的UV标度的纠缠熵。

英文摘要:

Ultraviolet divergences are widely discussed in studies of entanglement entropy. Also present, but much less understood, are infrared divergences due to zero modes in the field theory. In this note, we discuss the importance of carefully handling zero modes in entanglement entropy. We give an explicit example for a chain of harmonic oscillators in 1D, where a mass regulator is necessary to avoid an infrared divergence due to a zero mode. We also comment on a surprising contribution of the zero mode to the UV-scaling of the entanglement entropy.

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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