Poincaré series, 3d gravity and averages of rational CFT

Poincaré series, 3d gravity and averages of rational CFT
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庞加莱级数、3d 引力和有理 CFT 平均值

DOI:
10.1007/jhep04(2021)267
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发表时间:
2021
影响因子:
5.4
通讯作者:
Palash Singh
Palash Singh
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Viraj Meruliya;S. Mukhi;Palash Singh

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我们调查庞加莱系列的方法来计算三维重力配分函数的双理性CFT。对于单一亏格-1边界,我们证明了对于某些无限多个能级,SU(2)k WZW模型提供了酉例子,其中庞加莱级数是两个模不变配分函数的正线性组合。这支持了这样的解释,即体引力理论(在这种情况下是拓扑的陈-西蒙斯理论)与共享同一个卡茨-穆迪代数的不同CFT的平均值是对偶的。我们计算所有种子原色和所有相关k值的平均值的权重。然后,我们研究了其他WZW模型,特别是SU(N)1和SU(3)k,并发现每个类呈现出相当不同的功能。最后,我们考虑多个属-1边界,在那里我们找到了一类种子函数的庞加莱和,再现断开和连接的贡献-后者对应于类似物的3流形“虫洞”-这样的预期平均值是正确的再现。
We investigate the Poincaré series approach to computing 3d gravity partition functions dual to Rational CFT. For a single genus-1 boundary, we show that for certain infinite sets of levels, the SU(2)k WZW models provide unitary examples for which the Poincaré series is a positive linear combination of two modular-invariant partition functions. This supports the interpretation that the bulk gravity theory (a topological Chern-Simons theory in this case) is dual to an average of distinct CFT’s sharing the same Kac-Moody algebra. We compute the weights of this average for all seed primaries and all relevant values of k. We then study other WZW models, notably SU(N)1 and SU(3)k, and find that each class presents rather different features. Finally we consider multiple genus-1 boundaries, where we find a class of seed functions for the Poincaré sum that reproduces both disconnected and connected contributions — the latter corresponding to analogues of 3-manifold “wormholes” — such that the expected average is correctly reproduced.
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