Speaker
Philipp Höhn
Description
Quantum reference frames are a universal tool for dealing with symmetries in quantum systems. They are the means to describe a quantum system "from the inside" and key for completing the relational paradigm. As such, they naturally arise in quantum gravity whenever we build invariant observables. In this talk, I will review quantum reference frames and some of their applications to questions in quantum gravity. This will include gravitational von Neumann algebras, relational entanglement entropies, and (hopefully) a relational perspective on renormalization.
