High Energy Physics Seminar

Rosanna rosanna at ictp.it
Fri Sep 11 14:40:18 CEST 2020


TUESDAY, 15 SEPTEMBER 2020, 15:30 p.m.

/** Please note unusual time!!**/

(Rutherford Physics Bldg., McGill University, Canada)

"Gravity from Averaging CFTs"


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.

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