Results 21 to 30 of about 2,706,843 (321)
Effective gravitational action for 2D massive fermions
Journal of High Energy Physics, 2021 We work out the effective gravitational action for 2D massive Euclidean fermions in a small mass expansion. Besides the leading Liouville action, the order m 2 gravitational action contains a piece characteristic of the Mabuchi action, much as for 2D ...
Adel Bilal +2 more
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Quantum gravity inspired nonlocal gravity model [PDF]
Physical Review D, 2017 We consider a nonlocal gravity model motivated by nonperturbative Quantum Gravity studies. This model, if correct, suggests the existence of strong IR relevant effects which can lead to an interesting late time cosmology. We implement the IR modification directly in the effective action.
Henrik Nersisyan +3 more
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The two-sphere partition function from timelike Liouville theory at three-loop order
Journal of High Energy Physics, 2022 While the Euclidean two-dimensional gravitational path integral is in general highly fluctuating, it admits a semiclassical two-sphere saddle if coupled to a matter CFT with large and positive central charge. In Weyl gauge this gravity theory is known as
Beatrix Mühlmann
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Quantum exponentials for the modular double and applications in gravity models
Journal of High Energy Physics, 2023 In this note, we propose a decomposition of the quantum matrix group SL q + $$ {\textrm{SL}}_q^{+} $$ (2, ℝ) as (deformed) exponentiation of the quantum algebra generators of Faddeev’s modular double of U q ( sl $$ \mathfrak{sl} $$ (2, ℝ)).
Thomas G. Mertens
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Modeling quantum gravity effects in inflation [PDF]
Journal of High Energy Physics, 2014 43 pages, no ...
Martinec, Emil J., Moore, Wynton E.
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An outsider’s perspective on information recovery in de Sitter space
Journal of High Energy Physics, 2023 Entanglement islands play a crucial role in our understanding of how Hawking radiation encodes information in a black hole, but their relevance in cosmological spacetimes is less clear. In this paper, we continue our investigation of information recovery
Lars Aalsma +2 more
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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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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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A model of quantum collapse induced by gravity [PDF]
The European Physical Journal D, 2020 Version pubished in ...
openaire +7 more sources
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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