Events

Algebraic Structures in QFT in the Presence of a Quantum Reference Frame

I will start with introducing the framework of algebraic quantum field theory (also on curved spacetimes) and explain how to understand measurement in this framework using the approach of Fewster and Verch. In particular, I will demonstrate that in the presence of symmetries one needs to use a quantum reference frame to be able distinguish between measurements related by symmetry transformations. This leads to interesting consequences regarding the type of relevant observable algebras, as observed by Chandrasekaran, Longo, Penington and Witten in the context of QFT on de Sitter. This talk will be mostly based on my joint paper with Fewster, Janssen, Loveridge and Waldron, “Quantum reference frames, measurement schemes and the type of local algebras in quantum field theory.”

Zoom

Monday, November 17, 2025 11:00 AM

Inperson
BHI Conference Room