Speaker
Suddhasattwa Brahma
(Higgs Centre, University of Edinburgh)
Description
Quantum information techniques are playing a crucial role in our understanding of quantum aspects of spacetime. In particular for de Sitter space, I will illustrate this through two different examples. Firstly, I will show why momentum-space entanglement is an essential concept in early universe cosmology, as a quantifier for non-unitary evolution, and derive its conceptual ramifications for quantum corrections to cosmological observables. On the other hand, I will discuss why one needs to go beyond entanglement entropy and explore complexity for the Euclidean vacuum in de Sitter. Time permitting, I will briefly highlight why this quantum informatic measure is pivotal for establishing cosmic ER=EPR.
