213 citations · 1.9k across the 41 of their papers we have counts for
44 papers
Scale separation, rolling solutions and entropy bounds
David Andriot, Niccolò Cribiori, Thomas Van Riet
We revisit scale separation for compactifications of ten- and eleven-dimensional supergravity. For cosmological solutions rolling down flux-generated potentials, we observe that sc…
Exponential Quintessence: curved, steep and stringy?
David Andriot, Susha Parameswaran, Dimitrios Tsimpis +2
We explore the possibility that our universe's current accelerated expansion is explained by a quintessence model with an exponential scalar potential, , keepi…
On classical de Sitter solutions and parametric control
David Andriot, Fabian Ruehle
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 t…
Extensions of a scale-separated AdS solution and their mass spectrum
David Andriot, George Tringas
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…
Accelerated expansion of an open universe, and string theory realizations
David Andriot, Dimitrios Tsimpis, Timm Wrase
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(φ…
Bumping into the species scale with the scalar potential
David Andriot
As a quantum gravity cut-off, the species scale gets naturally compared to the energy scale of a scalar potential in an EFT. In this note, we compare the species scale, i…
Negative scalar potentials and the swampland: an Anti-Trans-Planckian Censorship Conjecture
David Andriot, Ludwig Horer, George Tringas
In this paper, we derive a characterisation of negative scalar potentials, , in -dimensional effective theories of quantum gravity. This is achieved thanks to an Anti-Trans…
Automated consistent truncations and stability of flux compactifications
David Andriot, Paul Marconnet, Muthusamy Rajaguru +1
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 fo…
(Quasi-) de Sitter solutions across dimensions and the TCC bound
David Andriot, Ludwig Horer
In this work, we investigate the existence of string theory solutions with a -dimensional (quasi-) de Sitter spacetime, for . Considering classical compactific…
Exploring the landscape of (anti-) de Sitter and Minkowski solutions: group manifolds, stability and scale separation
David Andriot, Ludwig Horer, Paul Marconnet
We classified in arXiv:2201.04152 certain 10d supergravity solutions with a 4d de Sitter, Minkowski or anti-de Sitter spacetime. We then found new solutions in previously unexplore…
Looking for structure in the cobordism conjecture
David Andriot, Nils Carqueville, Niccolò Cribiori
The cobordism conjecture of the swampland program states that the bordism group of quantum gravity must be trivial. We investigate this statement in several directions, on both the…
Charting the landscape of (anti-) de Sitter and Minkowski solutions of 10d supergravities
David Andriot, Ludwig Horer, Paul Marconnet
We classify solutions of 10d type IIA/B supergravities with orientifolds, on a 4d maximally symmetric spacetime times a 6d group manifold. We then look for new solutions in previou…
Warp factor and the gravitational wave spectrum
David Andriot, Paul Marconnet, Dimitrios Tsimpis
A distinct signature of compact extra dimensions would be a Kaluza-Klein tower of gravitational waves. Motivated by this prospect, we compute the corresponding spectrum on a warped…
Tachyonic de Sitter solutions of 10d type II supergravities
David Andriot
Cosmological models of the early or late universe exhibit (quasi) de Sitter space-times with different stability properties. Considering models derived from string theory, the swam…
Intricacies of classical de Sitter string backgrounds
David Andriot, Paul Marconnet, Timm Wrase
Up-to-date, there is no known example of a classical de Sitter solution of string theory, despite several good candidates. We consider here two newly discovered 10d supergravity de…
New de Sitter solutions of 10d type IIB supergravity
David Andriot, Paul Marconnet, Timm Wrase
We find and study 17 new de Sitter solutions of ten-dimensional (10d) type IIB supergravity with intersecting D5-branes and orientifold O5-planes, as well as a new Minkowski one. T…
The web of swampland conjectures and the TCC bound
David Andriot, Niccolò Cribiori, David Erkinger
We consider the swampland distance and de Sitter conjectures, of respective order one parameters and . Inspired by the recent Trans-Planckian Censorship conjecture (TCC), we…
A new mechanism for symmetry breaking from nilmanifolds
David Andriot, Alan Cornell, Aldo Deandrea +2
We present a method to obtain a scalar potential at tree level from a pure gauge theory on nilmanifolds, a class of negatively-curved compact spaces, and discuss the spontaneous sy…
Gravitational waves in warped compactifications
David Andriot, Dimitrios Tsimpis
We study gravitational waves propagating on a warped Minkowski space-time with D-4 compact extra dimensions. While Kaluza-Klein scales are typically too high for any current detect…
Open problems on classical de Sitter solutions
David Andriot
Classical 10d string backgrounds with a 4d de Sitter space-time, D-brane and orientifold sources, are commonly believed to satisfy the following: 1. There is no classical de Sitter…
Further refining the de Sitter swampland conjecture
David Andriot, Christoph Roupec
We propose an alternative refined de Sitter conjecture. It is given by a natural condition on a combination of the first and second derivatives of the scalar potential. We derive o…
New constraints on classical de Sitter: flirting with the swampland
David Andriot
We study the existence and stability of classical de Sitter solutions of type II supergravities with parallel Dp-branes and orientifold Op-planes. Together with the dilaton and vol…
On the de Sitter swampland criterion
David Andriot
A new swampland criterion has recently been proposed. As a consequence, it forbids the existence of de Sitter solutions in a low energy effective theory of a quantum gravity. Howev…
Laplacian spectrum on a nilmanifold, truncations and effective theories
David Andriot, Dimitrios Tsimpis
Motivated by low energy effective theories arising from compactification on curved manifolds, we determine the complete spectrum of the Laplacian operator on the three-dimensional…