THE NUT. “Note that the concept fits within flat space-time. That an observer comparing one region with a reference frame based on the vacuum configuration might see non-trivial geometry is in agreement with diffeomorphism invariance.” (“relative geometry constitutes a first deviation from the properties of a standard space-time scenario.”)
https://link.springer.com/content/pdf/10.1007/JHEP07(2019)140.pdf
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022