Year: 2026
Type: preprint
Abstract: We review the role of relative entropy in quantum field theories, where the local von Neumann algebras are generically of type III. Consequently, only few exact results are known, and even bounds are difficult to obtain. As a new result, we prove that the relative entropy between a locally squeezed state and the Minkowski vacuum is finite for free fermions.
Source: arXiv (Cornell University)
Author: Fröb, Markus B.
Institution: Friedrich-Alexander-Universität Erlangen-Nürnberg
Language: English
Subfield: Mathematical Physics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
OpenAlex ID: W7222103810