Crossed products and quantum reference frames: on the observer-dependence of gravitational entropy

Abstract A significant step towards a rigorous understanding of perturbative gravitational entropy was recently achieved by a series of works showing that a proper accounting of gauge invariance and observer degrees of freedom converts the Type III algebra of QFT observables in a gravitational subre...

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Bibliographic Details
Main Authors: Julian De Vuyst, Stefan Eccles, Philipp A. Höhn, Josh Kirklin
Format: Article
Language:English
Published: SpringerOpen 2025-07-01
Series:Journal of High Energy Physics
Subjects:
Online Access:https://doi.org/10.1007/JHEP07(2025)063
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