32 citations · 152 across the 16 of their papers we have counts for
17 papers
The Lorentzian Geometry of Tunneling in Global de Sitter at Late Time
Thibaut Coudarchet, Ben Freivogel, Bjoern Hassfeld +1
It is widely believed that Coleman--De Luccia (CDL) instantons characterize tunneling transitions in a de Sitter multiverse. Their most naive interpretation uses analytic continuat…
The String Theory Photoverse
Thibaut Coudarchet, Arthur Hebecker, Joerg Jaeckel +1
String theory compactifications come with numerous factors, implying the presence of many hidden photons in the low-energy EFT. One may call this the ``string photoverse''.…
Hiding the extra dimensions: A review on scale separation in string theory
Thibaut Coudarchet
We present an overview of both older and recent developments concerning scale separation in string theory. We focus on parametric scale separation obtained at the classical level i…
New families of scale separated vacua
Rafael Carrasco, Thibaut Coudarchet, Fernando Marchesano +1
Massive type IIA flux compactifications of the form AdS, where admits a Calabi-Yau metric and O6-planes wrapping three-cycles, display families of vacua with p…
Symmetric fluxes and small tadpoles
Thibaut Coudarchet, Fernando Marchesano, David Prieto +1
The analysis of type IIB flux vacua on warped Calabi--Yau orientifolds becomes considerably involved for a large number of complex structure fields. We however show that, for a qua…
Analytics of type IIB flux vacua and their mass spectra
Thibaut Coudarchet, Fernando Marchesano, David Prieto +1
We analyze the tree-level potential of type IIB flux compactifications in warped Calabi-Yau orientifolds, in regions of weak coupling and moderately large complex structure. In thi…
Geometry of orientifold vacua and supersymmetry breaking
Thibaut Coudarchet, Emilian Dudas, Hervé Partouche
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 w…
Two-point functions of Neumann-Dirichlet open-string sector moduli
Thibaut Coudarchet, Hervé Partouche
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}…
One-loop masses of Neumann-Dirichlet open strings and boundary-changing vertex operators
Thibaut Coudarchet, Hervé Partouche
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 t…
Moduli stability in type I string orbifold models
Thibaut Coudarchet, Hervé Partouche
We analyze the stability of the moduli at the quantum level in an open-string model realizing the spontaneous breaking of supersymmetry in four-dim…
On the stability of open-string orbifold models with broken supersymmetry
Steven Abel, Thibaut Coudarchet, Hervé Partouche
We consider an open-string realisation of spontaneous breaking of supersymmetry in four-dimensional Minkowski spacetime. It is based on type IIB or…
Spontaneous Freeze Out of Dark Matter
Thibaut Coudarchet, Lucien Heurtier, Hervé Partouche
We present a new paradigm for the production of dark-matter particles called the spontaneous freeze out, in which the decoupling from the thermal bath is enforced by the sudden inc…
Spontaneous dark-matter mass generation along cosmological attractors in string theory
Thibaut Coudarchet, Lucien Heurtier, Herve Partouche
We propose a new scenario for generating a relic density of non-relativistic dark matter in the context of heterotic string theory. Contrary to standard thermal freeze-out scenario…
Quantum no-scale regimes and moduli dynamics
Thibaut Coudarchet, Herve Partouche
We analyze quantum no-scale regimes (QNSR) in perturbative heterotic string compactified on tori, with total spontaneous breaking of supersymmetry. We show that for marginal deform…
Quantum no-scale regimes in string theory
Thibaut Coudarchet, Claude Fleming, Herve Partouche
We show that in generic no-scale models in string theory, the flat, expanding cosmological evolutions found at the quantum level can be attracted to a "quantum no-scale regime", wh…
Velocity fluctuations and boundary layer structure in a rough Rayleigh-B{é}nard cell filled with water
Olivier Liot, Quentin Ehlinger, Elonore Rusaouën +3
We report Particle Image Velocimetry of the Large Scale Circulation and the viscous boundary layer in turbulent thermal convection. We use two parallelepipedic Rayleigh-B{é}nard ce…
Simultaneous temperature and velocity Lagrangian measurements in turbulent thermal convection
O. Liot, F. Seychelles, F. Zonta +6
We report joint Lagrangian velocity and temperature measurements in turbulent thermal convection. Measurements are performed using an improved version (extended autonomy) of the ne…