Definition: The Osterwalder–Schrader theorem states conditions that correlation functions on Euclidean spacetime have to satisfy to be equivalent to the correlation functions of a Wightman QFT on Minkowski spacetime.
- It guides us how to relate collection functions calculated in flat spacetimes with Euclidean and Lorentzian signatures. Unfortunately, nothing like this is known when GR is involved, meaning with dynamical spacetime.
Published on May 28, 2021
Last revised on Jan 18, 2023