Orateur
Suddhasattwa Brahma
Description
I will review recent results, and list outstanding challenges, of deriving an emergent cosmological spacetime from string-theoretic models. I will give a proposal for how a metric can be coarse-grained from abstract matrix degrees of freedom, and how one naturally gets a scale-invariant spectrum of primordial perturbations in this model, without introducing arbitrary tunable parameters, by considering a thermal state in this model. In the second part, I will describe how a "collective-field" formalism can be employed to see the emergence of spacetime from matrix quantum mechanics.
