3 papers
hep-th2026
Relative entropy for in the Rindler wedge
Markus B. Fröb, Albert Much, Kyriakos Papadopoulos
We consider the relative entropy between the vacuum and a coherent state in the Rindler wedge for an interacting theory to first order in . We construct the perturbativel…
math-ph2026
A proposal for the algebra of a novel noncommutative spacetime
Markus B. Fröb, Albert Much, Kyriakos Papadopoulos
We investigate the quantum structure of spacetime at fundamental scales via a novel, Lorentz-invariant noncommutative coordinate framework. Building on insights from noncommutative…
gr-qc2024
Global Hyperbolicity and Self-adjointness
Markus B. Fröb, Albert Much, Kyriakos Papadopoulos
We show that the spatial part of the Klein-Gordon operator is an essentially self-adjoint operator on the Cauchy surfaces of various classes of spacetimes. Our proof employs the in…