Low-dimensional de Sitter quantum gravity
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep06(2020)048
Abstract: We study aspects of Jackiw-Teitelboim (JT) quantum gravity in two-dimensional nearly de Sitter (dS) spacetime, as well as pure de Sitter quantum gravity in three dimensions. These are each theories of boundary modes, which include… read more here.
Keywords: sitter quantum; genus expansion; sitter; gravity ... See more keywords
Quasinormal modes and the switchback effect in Schwarzschild-de Sitter
Sign Up to like & getrecommendations! Published in 2025 at "Journal of High Energy Physics"
DOI: 10.1007/jhep07(2025)050
Abstract: We study the causal structure of Schwarzschild-de Sitter (SdS), including shock wave perturbations, in D > 3 using reflected null ray trajectories, either through the interior black hole or the exterior de Sitter region. Specifically,… read more here.
Keywords: time; quasinormal modes; black hole; modes switchback ... See more keywords
Racing through the swampland: de Sitter uplift vs. weak gravity
Sign Up to like & getrecommendations! Published in 2018 at "Journal of High Energy Physics"
DOI: 10.1007/jhep09(2018)099
Abstract: A bstractWe observe that racetrack models for moduli stabilization are in tension with strong forms of the Weak Gravity Conjecture (WGC). Moreover, recently, it was noted that controlled KKLT-type de Sitter vacua seem to require… read more here.
Keywords: racing swampland; sitter; sitter uplift; weak gravity ... See more keywords
The unbearable lightness of charged gravitini
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DOI: 10.1007/jhep10(2021)076
Abstract: Abstract We prove that charged gravitini cannot have parametrically small or vanishing Lagrangian mass in de Sitter vacua of extended supergravity while respecting the magnetic weak gravity conjecture. This places large classes of de Sitter… read more here.
Keywords: lightness charged; supergravity; unbearable lightness; gravitini ... See more keywords
The fate of instability of de Sitter black holes at large D
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep11(2019)042
Abstract: Abstract We study non-linearly the gravitational instabilities of the Reissner- Nordstrom-de Sitter and the Gauss-Bonnet-de Sitter black holes by using the large D expansion method. In both cases, the thresholds of the instability are found… read more here.
Keywords: sitter black; fate instability; black holes; sitter ... See more keywords
Gravitationally dominated instantons and instability of dS, AdS and Minkowski spaces
Sign Up to like & getrecommendations! Published in 2024 at "Journal of High Energy Physics"
DOI: 10.1007/jhep11(2024)021
Abstract: We study the decay of the false vacuum in the regime where the quantum field theory analysis is not valid, since gravitational effects become important. This happens when the height of the barrier separating the… read more here.
Keywords: vacuum; anti sitter; sitter vacua; minkowski anti ... See more keywords
On causality violation on a Kerr-de Sitter spacetime
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DOI: 10.1007/s10714-018-2456-3
Abstract: The causal properties of the family of Kerr-de Sitter spacetimes are analyzed and compared to those of the Kerr family. First, an inextendible Kerr-de Sitter spacetime is obtained by joining together Carter’s blocks, i.e. suitable… read more here.
Keywords: causal; kerr sitter; sitter; sitter spacetime ... See more keywords
Dynamics of quantum correlation and coherence in de Sitter universe
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DOI: 10.1007/s11128-017-1659-y
Abstract: In this article, we investigate the dynamics of quantum correlation and coherence for two atoms interacting with massless scalar field in the background de Sitter spacetime. We firstly analyze the solving process of master equation… read more here.
Keywords: dynamics quantum; sitter; correlation coherence; correlation ... See more keywords
Quasinormal modes of the test fields in the consistent 4D Einstein–Gauss-Bonnet–(anti)de Sitter gravity
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DOI: 10.1016/j.aop.2021.168425
Abstract: Abstract The regularization proposed in Glavan and Lin (2020) led to the black hole solutions which turned out to be the solutions of the consistent well-defined 4-dimensional Einstein-Gauss–Bonnet theory of gravity suggested in Aoki et al.… read more here.
Keywords: anti sitter; einstein gauss; sitter; gauss bonnet ... See more keywords
Classicality of stochastic noise away from quasi-de Sitter inflation
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DOI: 10.1088/1475-7516/2024/10/053
Abstract: It is well known that a coarse-grained scalar field living on a de Sitter (dS) background exhibits classical stochastic behavior, driven by a noise whose amplitude is set by the Hubble constant H. The coarse-graining… read more here.
Keywords: stochastic noise; quasi sitter; noise away; sitter ... See more keywords
Higher order corrections to asymptotic-de Sitter inflation
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DOI: 10.1088/1674-1137/41/8/085101
Abstract: Since trans-Planckian considerations can be associated with the re-definition of the initial vacuum, we investigate further the influence of trans-Planckian physics on the spectra produced by the initial quasi-de Sitter (dS) state during inflation. We… read more here.
Keywords: sitter; inflation; space time; higher order ... See more keywords