Seminarium Wirtualne GQFI-WST

Recently it was shown that Entanglement Entropy for theories based on algebras of operators invariant under a global symmetry is non uniquely defined. This is a direct consequence of the fact that the algebra assigned to the region, in case of regions with non-trivial topology, does not satisfy the expected property of additivity/duality. This can be understood by noticing the existence of operators which cannot be locally generated within the region. These are called twists and intertwiners belonging to the region or its complement respectively. In this scenario, novel universal contributions, topological in nature, arise. Link: https://mpi-aei.zoom.us/j/92081379253