Archived weekly pre-prints 22-03-21

There is no new related paper today

[2203.09252] - Study of quantum gravity correction to the accretion onto the black hole in the GUP framework - Anisur Rahaman

Authors: Simon Boudet
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
Arxiv link: https://arxiv.org/abs/2203.08558
Abstract In the context of f(R) generalizations to the Holst action, endowed with a dynamical Immirzi field, we derive an analytic solution describing asymptotically anti-de Sitter black holes with hyperbolic horizon. These exhibit a scalar hair of the second kind which ultimately depends on the Immirzi field radial behaviour. In particular, we show how the Immirzi field modifies the usual entropy law associated to the black hole. We also verify that the Immirzi field boils down to a constant value in the asymptotic region, thus restoring the standard loop quantum gravity picture. We finally prove the violation of the reverse isoperimetric inequality, resulting in the superentropic nature of the black hole, and we discuss in detail the thermodynamic stability of the solution.

There is no new related paper today

There is no new related paper today

[2203.07854] - Light ray fluctuations in simplicial quantum gravity - Ding Jia
[2203.07384] - Alpha states demystified: Towards microscopic models of AdS$_2$ holography - Andreas Blommaert, Luca V. Iliesiu, Jorrit Kruthoff
[2203.07533] - Warped Compactifications in Particle Physics, Cosmology and Quantum Gravity - Prateek Agrawal, Cari Cesarotti, Andreas Karch, Rashmish K. Mishra, Lisa Randall, Raman Sundrum
[2203.07587] - Further swampland constraint on Dirac Neutrino - Taiga Harada, Yu Nakayama
[2203.08003] - The Spectral Geometry of de Sitter Space in Asymptotic Safety - Renata Ferrero, Martin Reuter

Authors: Martin Bojowald
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
Arxiv link: https://arxiv.org/abs/2203.06049
Abstract A recent paper promises new constructions that may make it possible to achieve covariance in spherically symmetric models of loop quantum gravity. This claim is contrary to the discovery of several stubborn obstacles to covariance uncovered in the same models during the last few years. As the authors point out in their abstract, new progress is supposedly possible if one takes into account crucial features of a certain partial Abelianization of the gauge transformations of spherically symmetric gravity, published by the same authors. In canonical form, these gauge transformations are given by hypersurface deformations. A closer inspection of the technical calculations shows that spherically symmetric hypersurface deformations are, in fact, violated in the construction.

There is no new related paper today

[2203.05575] - Constraints on Early Dark Energy from the Axion Weak Gravity Conjecture - Tom Rudelius

Authors: Martin Bojowald
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
Arxiv link: https://arxiv.org/abs/2203.06049
Abstract A recent paper promises new constructions that may make it possible to achieve covariance in spherically symmetric models of loop quantum gravity. This claim is contrary to the discovery of several stubborn obstacles to covariance uncovered in the same models during the last few years. As the authors point out in their abstract, new progress is supposedly possible if one takes into account crucial features of a certain partial Abelianization of the gauge transformations of spherically symmetric gravity, published by the same authors. In canonical form, these gauge transformations are given by hypersurface deformations. A closer inspection of the technical calculations shows that spherically symmetric hypersurface deformations are, in fact, violated in the construction.

There is no new related paper today

[2203.05575] - Constraints on Early Dark Energy from the Axion Weak Gravity Conjecture - Tom Rudelius