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Instanton Effects in Quantum Gravity

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Quantum gravity is hard. So when we figure out how to compute something in it, we celebrate. This is such an occasion. In this talk, I’ll describe a very concrete instanton-induced instability (computed with David Tong) to the dynamics of d=4, N=1 supergravity compactified on a circle. I will take time to explain how it arises by analogy with gauge theories, and give a general overview of the strategies required to tackle such a problem, in order to highlight points of conceptual interest like the non-cancellation of supersymmetric determinants, and the existence of a potential hidden IR scale in quantum gravity.

This talk is part of the HEP/GR Informal Seminar Series for Graduate Students series.

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