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arXiv · 2011.09444

A violation of global symmetries from replica wormholes and the fate of black hole remnants

Po-Shen Hsin·Luca V. Iliesiu·Zhenbin Yang
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Abstract

We show that the presence of replica wormholes in the Euclidean path integral of gravity leads to a non-perturbative violation of charge conservation for any global symmetry present in the low-energy description of quantum gravity. Explicitly, we compute the scattering probability between different charged states in several two-dimensional models of quantum gravity and find a non-vanishing answer. This suggests that the set of all charged states is typically over-complete, which has drastic consequences for the fate of black hole remnants that could carry a global symmetry charge. In the holographic context, we argue that the presence of such a symmetry in the effective description of the bulk should appear on the boundary as an emergent global symmetry after ensemble averaging.

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Po-Shen Hsin, Luca V. Iliesiu, Zhenbin Yang. 2021-07-28. A violation of global symmetries from replica wormholes and the fate of black hole remnants. https://doi.org/10.1088/1361-6382%2Fac2134

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