Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Partouche, Hervé"'
Publikováno v:
JHEP 05 (2024) 219
We extend a recent de Sitter holographic proposal and entanglement entropy prescription to generic closed FRW cosmologies in arbitrary dimensions, and propose that for large classes of bouncing and Big Bang/Big Crunch cosmologies, the full spacetime
Externí odkaz:
http://arxiv.org/abs/2310.20652
Publikováno v:
JHEP08(2023)074
In the context of de Sitter static-patch holography, two prescriptions have been put forward for holographic entanglement entropy computations, the monolayer and bilayer proposals. In this paper, we reformulate both prescriptions in a covariant way a
Externí odkaz:
http://arxiv.org/abs/2305.12861
We show that vanishing of the sigma-model beta-functions for the metric $g_{\mu\nu}$, antisymmetric tensor $B_{\mu\nu}$ and dilaton $\Phi$ of any string-theory model in $D$ dimensions at tree level can be obtained from a universal effective action, p
Externí odkaz:
http://arxiv.org/abs/2212.14659
We determine the inner product on the Hilbert space of wavefunctions of the universe by imposing the Hermiticity of the quantum Hamiltonian in the context of the minisuperspace model. The corresponding quantum probability density reproduces successfu
Externí odkaz:
http://arxiv.org/abs/2110.03050
Starting from a peculiar orientifold projection proposed long ago by Angelantonj and Cardella, we elaborate on a novel perturbative scenario that involves only D-branes, together with the two types of orientifold planes ${\rm O}_{\pm}$ and anti-orien
Externí odkaz:
http://arxiv.org/abs/2105.06913
We review some recent results concerning the Hartle--Hawking wavefunction of the universe. We focus on pure Einstein theory of gravity in the presence of a positive cosmological constant. We carefully implement the gauge-fixing procedure for the mini
Externí odkaz:
http://arxiv.org/abs/2105.04818
We consider the Hartle-Hawking wavefunction of the universe defined as a Euclidean path integral that satisfies the "no-boundary proposal." We focus on the simplest minisuperspace model that comprises a single scale factor degree of freedom and a pos
Externí odkaz:
http://arxiv.org/abs/2103.15168
Autor:
Coudarchet, Thibaut, Partouche, Hervé
We compute at one loop the two-point functions of massless scalars in the Neumann-Dirichlet open-string sector of the type IIB orientifold compactified on $T^2\times T^4/\mathbb{Z}_2$, when $\mathcal{N}=2$ supersymmetry is spontaneously broken. This
Externí odkaz:
http://arxiv.org/abs/2012.14442
Autor:
Coudarchet, Thibaut, Partouche, Hervé
We derive the masses acquired at one loop by massless scalars in the Neumann-Dirichlet sector of open strings, when supersymmetry is spontaneously broken. It is done by computing two-point functions of "boundary-changing vertex operators" inserted on
Externí odkaz:
http://arxiv.org/abs/2011.13725
The moduli space of the maximally supersymmetric heterotic string in d-dimensional Minkowski space contains various components characterized by the rank of the gauge symmetries of the vacua they parametrize. We develop an approach for describing in a
Externí odkaz:
http://arxiv.org/abs/2006.08194