LAUSR

Low-dimensional de Sitter quantum gravity

Sign Up to like & get
recommendations!
0 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

Racing through the swampland: de Sitter uplift vs. weak gravity

Sign Up to like & get
recommendations!
1 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

Sign Up to like & get
recommendations!
0 Published in 2021 at "Journal of High Energy Physics"

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 & get
recommendations!
1 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

On causality violation on a Kerr-de Sitter spacetime

Sign Up to like & get
recommendations!
1 Published in 2017 at "General Relativity and Gravitation"

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

Sign Up to like & get
recommendations!
1 Published in 2017 at "Quantum Information Processing"

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

Sign Up to like & get
recommendations!
1 Published in 2021 at "Annals of Physics"

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

Higher order corrections to asymptotic-de Sitter inflation

Sign Up to like & get
recommendations!
0 Published in 2017 at "Chinese Physics C"

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

Quantum fields in the static de Sitter universe

Sign Up to like & get
recommendations!
1 Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.102.085003

Abstract: We construct explicit mode expansions of various tree-level propagators in the Rindler–de Sitter universe, also known as the static (or compact) patch of the de Sitter spacetime. We construct in particular the Wightman functions for… read more here.

Keywords: sitter; fields static; sitter universe; construct ... See more keywords

Nonlinear perturbations of higher dimensional anti–de Sitter spacetime

Sign Up to like & get
recommendations!
0 Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.102.104026

Abstract: We study nonlinear gravitational perturbations of vacuum Einstein equations, with $\Lambda 2$, generalizing previous studies for $n=2$. We follow the formalism by Ishibashi, Kodama and Seto to decompose the metric perturbations into tensor, vector and… read more here.

Keywords: perturbations higher; nonlinear perturbations; higher dimensional; anti sitter ... See more keywords

Analytic formula for quasinormal modes in the near-extreme Kerr-Newman–de Sitter spacetime governed by a non-Pöschl-Teller potential

Sign Up to like & get
recommendations!
1 Published in 2022 at "Physical Review D"

DOI: 10.1103/physrevd.105.084003

Abstract: Quasinormal modes of scalar, electromagnetic, and gravitational fields in the extreme Schwarzschild-de Sitter background are known to be expressed in analytic form as eigenvalues of the Pöschl-Teller wavelike equation. We show that perturbations of fermionic… read more here.

Keywords: formula quasinormal; schl teller; sitter; near extreme ... See more keywords