Archived weekly pre-prints 23-02-20

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[2302.07903] - Beyond semiclassical time: dynamics in quantum cosmology - Leonardo Chataignier
[2302.08120] - Generalised Uncertainty Relations from Finite-Accuracy Measurements - Matthew J. Lake, Marek Miller, Ray Ganardi, Tomasz Paterek
[2302.07892] - Holograms In Our World - Raphael Bousso, Geoff Penington
[2302.08131] - On weak Hopf symmetry and weak Hopf quantum double model - Zhian Jia, Sheng Tan, Dagomir Kaszlikowski, Liang Chang

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[2302.07644] - Schrödinger symmetry of Schwarzschild-(A)dS black hole mechanics - Jibril Ben Achour, Etera R. Livine, Daniele Oriti
[2302.07835] - Quantum gravitational corrected evolution equations of charged black holes - Ruben Campos Delgado

Authors: Tatevik Vardanyan, Claus Kiefer
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
Arxiv link: https://arxiv.org/abs/2302.07001
Abstract We study the quantum-gravitational corrections to the power spectrum of a gauge-invariant inflationary scalar perturbations in a closed model of a universe. We consider canonical quantum gravity as an approach to quantizing gravity. This leads to the Wheeler-DeWitt equation, which has been studied by applying a semiclassical Born-Oppenheimer type of approximation. At the corresponding orders of approximation, we recover both the uncorrected and quantum-gravitationally corrected Schroedinger equations for the perturbation modes from which we calculate the quantum-gravitational corrections to the power spectrum in the slow-roll regime. The results are compared to the power spectra for the flat model of the universe.

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[2302.06661] - Self-Dual Black Holes in Celestial Holography - Erin Crawley, Alfredo Guevara, Elizabeth Himwich, Andrew Strominger

Authors: Eugenio Bianchi, Etera R. Livine
Subjects: General Relativity and Quantum Cosmology (gr-qc)
Arxiv link: https://arxiv.org/abs/2302.05922
Abstract We summarize recent developments at the interface of quantum gravity and quantum information, and discuss applications to the quantum geometry of space in loop quantum gravity. In particular, we describe the notions of link entanglement, intertwiner entanglement, and boundary spin entanglement in a spin-network state. We discuss how these notions encode the gluing of quanta of space and their relevance for the reconstruction of a quantum geometry from a network of entanglement structures. We then focus on the geometric entanglement entropy of spin-network states at fixed spins, treated as a many-body system of quantum polyhedra, and discuss the hierarchy of volume-law, area-law and zero-law states. Using information theoretic bounds on the uncertainty of geometric observables and on their correlations, we identify area-law states as the corner of the Hilbert space that encodes a semiclassical geometry, and the geometric entanglement entropy as a probe of semiclassicality.

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[2302.05713] - Euclidean Quantum Gravity from Variational Dynamics - Brenden McDearmon
[2302.05861] - Quasinormal modes of a scalar perturbation around a rotating BTZ-like black hole in Einstein-bumblebee gravity - Chengjia Chen, Qiyuan Pan, Jiliang Jing
[2302.06362] - Generation of entanglement between two laser pulses through gravitational interaction - Feifan He, Baocheng Zhang
[2302.06603] - Isometric evolution in de Sitter quantum gravity - Jordan Cotler, Kristan Jensen

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[2302.04905] - An Integer Basis for Celestial Amplitudes - Jordan Cotler, Noah Miller, Andrew Strominger