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gr-qc2026
On the (Non)Unitarity with respect to the Clock of a Dynamical Local Observer and the Einstein Equivalence Principle
Kengo Shimada
We investigate the unitarity of quantum evolution relative to an internal time defined by a local observer's clock. The observer is modeled as a relativistic particle carrying both…
gr-qc2012★ 1 cited
The Einstein equation of state as the Clausius relation with an entropy production
Kengo Shimada, Susumu Okazawa, Satoshi Iso
We give a modified derivation of the Einstein equation of state by considering the Clausius relation on a null hypersurface with a non-vanishing expansion (),…