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arXiv 1902.07066hep-th
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BMS特征标与模不变性

BMS Characters and Modular Invariance

Arjun Bagchi, Amartya Saha, Zodinmawia

摘要:

构造了3dBondi-Metzner-Sachs(BMS $_3$)代数的最高权表示的特征标.然后,我们使用这些来构建的配分函数,并显示如何使用BMS模块化的转换,以获得密度的初级状态。这样得到的熵占了从BMS-Cardy公式得到的熵的主要部分。这表明BMS原色捕获了平空间宇宙学的大部分熵,这是AdS $_3$中BTZ黑洞的平空间类似物。我们重现我们的字符公式,从二维CFT字符的奇异极限,发现我们的答案是相同的字符得到非常不同的诱导表示。我们提供了一个代数的解释,这所产生的(据我们所知)新的自同构在父二维CFT。

英文摘要:

We construct the characters for the highest weight representations of the 3d Bondi-Metzner-Sachs (BMS$_3$) algebra. We then use these to construct the partition function and show how to use BMS modular transformations to obtain a density of primary states. The entropy thus obtained accounts for the principle part of the entropy obtained from the BMS-Cardy formula. This suggests that BMS primaries capture most of the entropy of Flat Space Cosmologies, which are the flatspace analogues of BTZ black holes in AdS$_3$. We reproduce our character formula by looking at singular limits from 2d CFT characters and find that our answers are identical to the characters obtained for the very different induced representations. We offer an algebraic explanation to this arising from a (to the best of our knowledge) novel automorphism in the parent 2d CFT.

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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