Results 41 to 50 of about 173,760 (383)
The two-sphere partition function in two-dimensional quantum gravity
Journal of High Energy Physics, 2021 We study the Euclidean path integral of two-dimensional quantum gravity with positive cosmological constant coupled to conformal matter with large and positive central charge.
Dionysios Anninos +2 more
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Effective line elements and black-hole models in canonical loop quantum gravity [PDF]
Physical Review D, 2018 Canonical quantization is often used to suggest new effects in quantum gravity, in the dynamics as well as the structure of space-time. Usually, possible phenomena are first seen in a modified version of the classical dynamics, for instance in an ...
M. Bojowald +2 more
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Quantum gravity on finite spacetimes and dynamical mass [PDF]
Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021), 2022 We review quantum gravity model building using the new formalism of `quantum Riemannian geometry' to construct this on finite discrete spaces and on fuzzy ones such as matrix algebras.
S. Majid, J. N. Argota-Quiroz
semanticscholar +1 more source
Quantum gravity as a multitrace matrix model [PDF]
International Journal of Modern Physics A, 2017 We present a new model of quantum gravity as a theory of random geometries given explicitly in terms of a multitrace matrix model. This is a generalization of the usual discretized random surfaces of two-dimensional quantum gravity which works away from two dimensions and captures a large class of spaces admitting a finite spectral triple.
Badis Ydri +3 more
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Universal critical behavior in tensor models for four-dimensional quantum gravity [PDF]
Journal of High Energy Physics, 2019 Four-dimensional random geometries can be generated by statistical models with rank-4 tensors as random variables. These are dual to discrete building blocks of random geometries. We discover a potential candidate for a continuum limit in such a model by
A. Eichhorn +3 more
semanticscholar +1 more source
The price of curiosity: information recovery in de Sitter space
Journal of High Energy Physics, 2021 Recent works have revealed that quantum extremal islands can contribute to the fine-grained entropy of black hole radiation reproducing the unitary Page curve.
Lars Aalsma, Watse Sybesma
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Signature change in two-dimensional black-hole models of loop quantum gravity [PDF]
Physical Review D, 2016 Signature change has been identified as a generic consequence of holonomy modifications in spherically symmetric models of loop quantum gravity with real connections, which includes modified Schwarzschild solutions.
M. Bojowald, Suddhasattwa Brahma
semanticscholar +1 more source
Double scaling limits of Dirac ensembles and Liouville quantum gravity [PDF]
Journal of Physics A: Mathematical and Theoretical, 2022 In this paper we study ensembles of finite real spectral triples equipped with a path integral over the space of possible Dirac operators. In the noncommutative geometric setting of spectral triples, Dirac operators take the center stage as a replacement
Hamed Hessam +2 more
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A MINIMAL MODEL FOR QUANTUM GRAVITY [PDF]
Modern Physics Letters A, 2005 We argue that the model of a quantum computer with N qubits on a quantum space background, which is a fuzzy sphere with n = 2N elementary cells, can be viewed as the minimal model for quantum gravity. In fact, it is discrete, has no free parameters, is Lorentz-invariant, naturally realizes the holographic principle, and defines a subset of punctures ...
openaire +3 more sources
Gravitational Decoherence [PDF]
, 1938 We discuss effects of loss of coherence in low energy quantum systems caused by or related to gravitation, referred to as gravitational decoherence.
Bassi, Angelo +2 more
core +19 more sources