Joint cosmology seminar at Tufts online:

Tuesday, February 15, 2022, 2:30 pm

{\large\sf Zoom link will be distributed to joint cosmology seminar mailing list. See\\

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Tufts University

**Emergent Cosmology from Matrix Theory**

Robert Brandenberger

McGill University

Abstract:

The BFSS (Banks, Fischler, Shenker and Susskind) matrix model is a proposed non-perturbative definition of superstring theory. It is a quantum mechanical model of nine N x N Hermitean matrices (no background space). Recent work has shown that in the large N limit, a continous space with three large and six small dimensions emerges. We show that thermal fluctuations in a high temperature state of this model yield scale-invariant spectra of cosmological perturbations and gravitational waves. Thus, the BFSS matrix model may yield both emergent space and an emergent early universe phase.