Noncommutative QFT and Relative Entropy on Axisymmetric Bifurcate Killing Horizons

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Hauptverfasser: Dorau, Philipp, Much, Albert, Verch, Rainer
Format: Preprint
Veröffentlicht: 2026
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author Dorau, Philipp
Much, Albert
Verch, Rainer
author_facet Dorau, Philipp
Much, Albert
Verch, Rainer
contents We construct a deformed algebraic quantum field theory on bifurcate Killing horizons in stationary axisymmetric spacetimes. The deformation is generated by the commuting actions of affine dilations along the null generators of the horizon and rotations about the axis of symmetry, analogously to the Moyal-Rieffel deformation. Physically, this effectively implements a noncommutative geometric structure of the horizon. Moreover, we compute the relative entropy between coherent states in the deformed horizon theory, which remains strictly positive and exhibits a novel second-order correction in the deformation parameter, which becomes particularly significant for black holes whose horizon area is sufficiently small for Planck-scale effects to become non-negligible.
format Preprint
id arxiv_https___arxiv_org_abs_2603_13029
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Noncommutative QFT and Relative Entropy on Axisymmetric Bifurcate Killing Horizons
Dorau, Philipp
Much, Albert
Verch, Rainer
High Energy Physics - Theory
General Relativity and Quantum Cosmology
Mathematical Physics
We construct a deformed algebraic quantum field theory on bifurcate Killing horizons in stationary axisymmetric spacetimes. The deformation is generated by the commuting actions of affine dilations along the null generators of the horizon and rotations about the axis of symmetry, analogously to the Moyal-Rieffel deformation. Physically, this effectively implements a noncommutative geometric structure of the horizon. Moreover, we compute the relative entropy between coherent states in the deformed horizon theory, which remains strictly positive and exhibits a novel second-order correction in the deformation parameter, which becomes particularly significant for black holes whose horizon area is sufficiently small for Planck-scale effects to become non-negligible.
title Noncommutative QFT and Relative Entropy on Axisymmetric Bifurcate Killing Horizons
topic High Energy Physics - Theory
General Relativity and Quantum Cosmology
Mathematical Physics
url https://arxiv.org/abs/2603.13029