44 citations · 310 across the 38 of their papers we have counts for
8 papers · 1 filter
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…