Zobrazeno 1 - 10
of 198
pro vyhledávání: '"P. Andriot"'
Autor:
Andriot, David
We focus on minimally coupled (multi)field quintessence models and their realistic solutions. In a model-independent manner, we describe analytically these cosmological solutions throughout the universe history. Starting with a kination - radiation d
Externí odkaz:
http://arxiv.org/abs/2410.17182
We explore the possibility that our universe's current accelerated expansion is explained by a quintessence model with an exponential scalar potential, $V =V_0\, e^{-\lambda\, \phi}$, keeping an eye towards $\lambda \geq \sqrt{2}$ and an open univers
Externí odkaz:
http://arxiv.org/abs/2405.09323
Autor:
Andriot, David, Ruehle, Fabian
Finding string backgrounds with de Sitter spacetime, where all approximations and corrections are controlled, is an open problem. We revisit the search for de Sitter solutions in the classical regime for specific type IIB supergravity compactificatio
Externí odkaz:
http://arxiv.org/abs/2403.07065
Autor:
Andriot, David, Tringas, George
We consider two extensions of the so-called DGKT solution, a 4d scale-separated anti-de Sitter (AdS) solution obtained as a compactification on a 6d torus orbifold. Each extension consists in a specific large $n$ expansion beyond the DGKT solution, w
Externí odkaz:
http://arxiv.org/abs/2310.06115
Recently, many works have tried to realize cosmological accelerated expansion in string theory models in the asymptotic regions of field space, with a typical scalar potential $V(\varphi)$ having an exponential fall-off $e^{-\gamma\, \varphi}$. Those
Externí odkaz:
http://arxiv.org/abs/2309.03938
Autor:
Andriot, David
As a quantum gravity cut-off, the species scale $\Lambda_s$ gets naturally compared to the energy scale of a scalar potential $V$ in an EFT. In this note, we compare the species scale, its rate $|\nabla \Lambda_s|/\Lambda_s$ and their field dependenc
Externí odkaz:
http://arxiv.org/abs/2305.07480
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 8, Pp 1-60 (2024)
Abstract We explore the possibility that our universe’s current accelerated expansion is explained by a quintessence model with an exponential scalar potential, V = V 0 e −λ ϕ , keeping an eye towards λ ≥ 2 $$ \sqrt{2} $$ and an open univers
Externí odkaz:
https://doaj.org/article/4120f24f20a44f7a8277483751d581e2
Autor:
David Andriot, Fabian Ruehle
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-43 (2024)
Abstract Finding string backgrounds with de Sitter spacetime, where all approximations and corrections are controlled, is an open problem. We revisit the search for de Sitter solutions in the classical regime for specific type IIB supergravity compac
Externí odkaz:
https://doaj.org/article/04a35b57090a418eac1aa8f44a34b6f1
In this paper, we derive a characterisation of negative scalar potentials, $V<0$, in $d$-dimensional effective theories of quantum gravity. This is achieved thanks to an Anti-Trans-Planckian Censorship Conjecture (ATCC), inspired by a refined version
Externí odkaz:
http://arxiv.org/abs/2212.04517
Publikováno v:
JHEP12(2022)026
Classical flux compactifications contribute to a well-controlled corner of the string landscape, therefore providing an important testing ground for a variety of conjectures. We focus here on type II supergravity compactifications on 6d group manifol
Externí odkaz:
http://arxiv.org/abs/2209.08015