Macroscopic Coherence and Effective Sources in Relative-Entropy Semiclassical Gravity
Abstract
Relative-entropy derivations of gravity require specifying a macroscopic source algebra. We propose that, for neutral matter, the relevant object is the Araki--Uhlmann relative entropy of states restricted to the C-even stress-energy carrier algebra, separating gravitational sourcing from C-odd electromagnetic readout. For superconducting condensates, we model the C-even source-state dependence by a susceptibility of order $\alpha\Delta/E_F$, identifying London-moment measurements as a ppm-scale constraint channel.
Fields of Study & Subjects
Black Holes and Theoretical Physics
Cosmology and Gravitation Theories
Noncommutative and Quantum Gravity Theories
Publication details
- Journal / source
- Zenodo (CERN European Organization for Nuclear Research)
- Publication date
- 16 July 2026
- Language
- EN
- Document type
- Preprint