Gravity from Averaging CFTs

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• Alexander Maloney (McGill)
• Thursday 29 April 2021, 13:00-14:00
• Online (Zoom).

If you have a question about this talk, please contact Pietro Benetti Genolini.

I will explore the idea that certain theories of gravity in Anti-de Sitter space are dual to an average over an ensemble of quantum theories, rather than to a specific quantum theory. I will describe an average over Narain’s family of two-dimensional conformal field theories which describe free bosons on a torus, and compute the partition function using the Siegel-Weil formula. The result takes the form of a sum over geometries as one would expect in a theory of gravity. But the gravitational theory looks more like a Chern-Simons theory than like Einstein gravity.

This talk is part of the Quantum Fields and Strings Seminars series.

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