Sommaire:

Entanglement entropy is a valuable tool for characterizing the correlation structure of quantum field theories. When applied to gauge theories, subtleties arise which prevent the factorization of the Hilbert space underlying the notion of entanglement entropy. Borrowing techniques from extended topological field theories, I introduce a new definition of entanglement entropy for both Abelian and non–Abelian gauge theories. I will then relate this construction to earlier proposals and argue that it brings these closer to each other. I will also point out that different definitions of entanglement entropies can be related to choices of (squeezed) vacuum states and excitations there upon. Time allowing, I will briefly discuss aspects more closely related to topics in quantum gravity.

Pour plus d'informations, merci de contacter Alexandrov S.