44 citations · 310 across the 38 of their papers we have counts for
43 papers
Clarifications on black/white hole metastable relics as dark matter
Aurélien Barrau, Margaux Gajocha, Killian Martineau +3
The idea that the evaporation of black holes could end around the Planck mass and lead to relics possibly accounting for dark matter is quite old. In this article we focus on new m…
Large deviations for halos and voids: beyond perturbative non-gaussianities
Martin Teuscher, Ruth Durrer, Julien Grain +2
The excursion-set formalism provides a key connection between primordial density fluctuations and the abundance of cosmic structures such as dark matter halos and voids, traditiona…
A universal scaling law for gravitational waves induced during inflation
Martin Teuscher, Ruth Durrer, Killian Martineau +1
We consider the stochastic gravitational wave background induced by arbitrary source fields that are amplified during cosmological inflation. The associated tensor spectral index i…
Black holes in a dense infinite medium: a toy-model regularizing the Schwarzschild metric
Aurélien Barrau, Killian Martineau, Hanane Zelgoum
We revisit the dynamics of a black hole accreting energy from a surrounding homogeneous and infinite space. We argue for a simple heuristic modification of the Schwarzschild approx…
Can the diffeomorphism and Gauss constraints be holonomy corrected in the deformed algebra approach to modified gravity?
Jamy-Jayme Thézier, Aurélien Barrau, Killian Martineau +1
Deforming the algebra of constraint is a well-known approach to effective loop quantum cosmology. More generally, it is a consistent way to modify gravity from the Hamiltonian pers…
Gravitational Waves sourced by Gauge Fields during Inflation
Martin Teuscher, Ruth Durrer, Killian Martineau +1
We study the inflationary gravitational wave background induced by Abelian gauge fields generated by non-minimal kinetic and axial couplings to the inflaton. We show that, up to sl…
Stochastic background of gravitational waves from cosmic-rays
Aurélien Barrau, Juan García-Bellido, Killian Martineau +1
Cosmic-rays are charged particles moving in magnetic fields. They not only emit well-known synchrotron photons but also gravitational radiation. We clarify the characteristics of t…
Anomaly freedom in effective Loop Quantum Cosmology refined: extended functional dependence of the counter-terms
Maxime De Sousa, Aurélien Barrau, Killian Martineau
Instead of assuming that they depend only on the background variables, we investigate the hypothesis that counter-terms appearing in the deformed algebra approach to loop quantum c…
Elementary considerations on possible entropy-driven cosmological evolutions
Jamy-Jayme Thézier, Aurélien Barrau, Killian Martineau
For several independent reasons, the idea that notorious sources of entropy could exist in the Universe has been recently revived. Taking advantage of a new framework accounting fo…
Challenges and Opportunities of Gravitational Wave Searches above 10 kHz
Nancy Aggarwal, Odylio D. Aguiar, Diego Blas +34
The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges…
Emission and detection of ultra high frequency gravitational waves from highly eccentric orbits of compact binary systems
Pierre Jamet, Aurélien Barrau, Killian Martineau
The ultrahigh frequency emission of gravitational waves by binary systems of black holes has recently been investigated in details in the framework of new experimental ideas around…
Anomaly freedom in effective Loop Quantum Cosmology: pedagogical summary and generalized holonomy corrections
Maxime De Sousa, Aurélien Barrau, Killian Martineau
The issue of consistency is crucial in quantum gravity. It has recently been intensively addressed for effective symmetry-reduced models. In this article, we exhaustively study the…
Boosting gravitational waves: a review of kinematic effects on amplitude, polarization, frequency and energy density
Giulia Cusin, Cyril Pitrou, Camille Bonvin +2
We review the kinematic effects on a gravitational wave due to either a peculiar motion of the astrophysical source emitting it or a local motion of the observer. Working in the co…
Prospects for detection of ultra high frequency gravitational waves from hyperbolic encounters with resonant cavities
Aurélien Barrau, Juan García-Bellido, Killian Martineau +1
In this brief article, we pursue the systematic investigation of possible gravitational wave sources in the gigahertz band. We focus on hyperbolic encounters of light black holes a…
Elementary considerations on gravitational waves from hyperbolic encounters
Martin Teuscher, Aurélien Barrau, Killian Martineau
We examine the main properties of gravitational waves (GWs) emitted by transient hyperbolic encounters of black holes. We begin by building the set of basic variables most relevant…
Gravitational waves from high-power twisted light
Eduard Atonga, Killian Martineau, Ramy Aboushelbaya +12
Recent advances in high-energy and high-peak-power laser systems have opened up new possibilities for fundamental physics research. In this work, the potential of twisted light for…
Einstein vs Hawking: Black hole binaries and cosmological expansion
Aurélien Barrau, Baptiste Blachier, Maxime Lahlou +2
This note aims at investigating two different situations where the classical general relativistic dynamics competes with the evolution driven by Hawking evaporation. We focus, in p…
Squeezing of light from Planck-scale physics
Danilo Artigas, Killian Martineau, Jakub Mielczarek
In this article, the possibility of generating non-classical light due to Planck-scale effects is considered. For this purpose, a widely studied model of deformation of the Heisenb…
Competitive effects between gravitational radiation and mass variation for two-body systems in circular orbits
Baptiste Blachier, Aurélien Barrau, Killian Martineau +1
This work provides, at lower order, general analytical solutions for the orbital separation, merging time, and orbital frequency of binary systems emitting gravitational waves whil…
Closer look at cosmological consequences of interacting group field theory
Maxime De Sousa, Aurélien Barrau, Killian Martineau
Group field theory has shown to be a promising framework to derive cosmological predictions from full quantum gravity. In this brief note, we revisit the background dynamics when i…
Prospects for detection of ultra high frequency gravitational waves from compact binary coalescenses with resonant cavities
Aurélien Barrau, Juan García-Bellido, Thierry Grenet +1
This article aims at clarifying the situation about astrophysical sources that might be observed with haloscope experiments sensitive to gravitational waves in the 1-10 GHz band. T…
Impact of generalized holonomy corrections on the cosmological primordial power spectra
Maxime De Sousa, Killian Martineau, Cyril Renevey +1
The propagation of perturbations is studied with generalized holonomy corrections in a fully consistent way, ensuring that the deformed algebra of constraints remains closed. The p…
Detailed analysis of the curvature bounce: background dynamics and imprints in the CMB
Cyril Renevey, Aurélien Barrau, Killian Martineau
If the spatial sections of the Universe are positively curved, extrapolating the inflationary stage backward in time inevitably leads to a classical bounce. This simple scenario, n…
Catastrophic fate of Schwarzschild black holes in a thermal bath
Aurélien Barrau, Killian Martineau, Cyril Renevey
Using the Schwarzschild metric as a rudimentary toy model, we pedagogically revisit the curious prediction that the mass of a classical black hole in a constant temperature thermal…