135 citations · 796 across the 30 of their papers we have counts for
32 papers
Electromagnetic Antennas for the Resonant Detection of the Stochastic Gravitational Wave Background
Nicolas Herman, Léonard Lehoucq, André Fűzfa
Stochastic gravitational wave background from the early Universe has a cut-off frequency close to 100 MHz, due to the horizon of the inflationary phase. To detect gravitational wav…
Detecting Planetary-mass Primordial Black Holes with Resonant Electromagnetic Gravitational Wave Detectors
Nicolas Herman, André Füzfa, Léonard Lehoucq +1
The possibility to detect gravitational waves (GW) from planetary-mass primordial black hole (PBH) binaries with electromagnetic (EM) detectors of high-frequency GWs is investigate…
Sailing Towards the Stars Close to the Speed of Light
Andre Fuzfa, Williams Dhelonga-Biarufu, Olivier Welcomme
The authors describe the general motion of radiation-pushed sails accelerated near the speed of light with directed energy propulsion. Practical applications of the model are also…
Mimicking Dark Energy with the backreactions of gigaparsec inhomogeneities
Sebastien Clesse, Arnaud Roisin, André Füzfa
Spatial averaging and time evolving are non-commutative operations in General Relativity, which questions the reliability of the FLRW model. The long standing issue of the importan…
Electromagnetic Gravitational Waves Antennas for Directional Emission and Reception
A. Füzfa
A successful experiment combining emission and reception of gravitational waves (GWs) would constitute a premiere of gravity control. However, such experiments manipulating gravity…
Numerical forecasts for lab experiments constraining modified gravity: the chameleon model
Sandrine Schlogel, Sebastien Clesse, Andre Fuzfa
Current acceleration of the cosmic expansion leads to coincidence as well as fine-tuning issues in the framework of general relativity. Dynamical scalar fields have been introduced…
Non-linear cosmological collapse of quintessence
Jeremy Rekier, Andre Fuzfa, Isabel Cordero-Carrion
We present a study of the fully relativistic spherical collapse in presence of quintessence using on Numerical Relativity, following the method proposed by the authors in a previou…
Probing Modified Gravity with Atom-Interferometry: a Numerical Approach
Sandrine Schlogel, Sebastien Clesse, Andre Fuzfa
Refined constraints on chameleon theories are calculated for atom-interferometry experiments, using a numerical approach consisting in solving for a four-region model the static an…
How current loops and solenoids curve space-time
A. Füzfa
The curved space-time around current loops and solenoids carrying arbitrarily large steady electric currents is obtained from the numerical resolution of the coupled Einstein-Maxwe…
Particlelike solutions of modified gravity: the Higgs monopoles
Sandrine Schlogel
The lore paradigm for solving so-called horizon and flatness problems in cosmology is the primordial inflation. Plethora of inflationary models have been built in last decades and…
Fully relativistic nonlinear cosmological evolution in spherical symmetry using the BSSN formalism
Jeremy Rekier, Isabel Cordero-Carrion, Andre Fuzfa
We present a fully relativistic numerical method for the study of cosmological problems using the Baumgarte-Shapiro-Shibata-Nakamura formalism on a dynamical Friedmann-Lemaître-Rob…
Particlelike solutions in modified gravity: the Higgs monopole
Sandrine Schlogel, Massimiliano Rinaldi, Francois Staelens +1
Higgs inflation has received a remarkable attention in the last few years due to its simplicity and predictive power. The key point of this model is the nonminimal coupling to grav…
The Jungle Universe
Jérôme Perez, André Füzfa, Timoteo Carletti +2
In this paper, we exploit the fact that the dynamics of homogeneous and isotropic Friedmann-Lemaitre universes is a special case of generalized Lotka-Volterra system where the comp…
Particlelike distributions of the Higgs field nonminimally coupled to gravity
Andre Fuzfa, Massimiliano Rinaldi, Sandrine Schlogel
When the Higgs field is nonminimally coupled to gravity, there exists a family of spherically symmetric particlelike solutions to the field equations. These monopoles are the only…
Simulations of Solar System observations in alternative theories of gravity
A. Hees, B. Lamine, S. Reynaud +7
In this communication, we focus on the possibility to test General Relativity (GR) with radioscience experiments. We present simulations of observables performed in alternative the…
Can the Chameleon mechanism explain cosmic acceleration while satisfying Solar System constraints ?
A. Hees, A. Füzfa
The chameleon mechanism appearing in massive tensor-scalar theory of gravity can effectively reduce the nonminimal coupling between the scalar field and matter. This mechanism is i…
Cosmic acceleration with cosmological soft phonons in a network of large structures
J. Rekier, A. Füzfa
The dark energy scalar field is here presented as a mean-field effect arising from the collective motion of interacting structures on an expanding lattice. This cosmological analog…
Fab Four: When John and George play gravitation and cosmology
Jean-Philippe Bruneton, Massimiliano Rinaldi, Antonin Kanfon +3
Scalar-tensor theories of gravitation have recently regained a great interest after the discovery of the Chameleon mechanism and of the Galileon models. The former allows, in princ…
Radioscience simulations in General Relativity and in alternative theories of gravity
A. Hees, B. Lamine, S. Reynaud +7
In this paper, we focus on the possibility to test General Relativity in the Solar System with radioscience measurements. To this aim, we present a new software that simulates Rang…
Combined cosmological and solar system constraints on chameleon mechanism
A. Hees, A. Füzfa
Chameleon mechanism appearing in massive tensor-scalar theory of gravity can effectively reduce locally the non-minimal coupling between the scalar field and matter. This mechanism…
Radioscience simulations in General Relativity and in alternative theories of gravity
Aurelien Hees, Peter Wolf, Brahim Lamine +6
In this communication, we focus on the possibility to test GR with radioscience experiments. We present a new software that in a first step simulates the Range/Doppler signals dire…
Introducing the Dark Energy Universe Simulation Series (DEUSS)
Y. Rasera, J-M. Alimi, J. Courtin +4
In this "Invisible Universe" proceedings, we introduce the Dark Energy Universe Simulation Series (DEUSS) which aim at investigating the imprints of realistic dark energy models on…
The Abnormally Weighting Energy Hypothesis: The origin of the cosmic acceleration
J. -M. Alimi, A. Fuzfa
We generalize tensor-scalar theories of gravitation by the introduction of an abnormally weighting type of energy. This theory of tensor-scalar anomalous gravity is based on a rela…
Dark Matter and Dark Energy from Gravitational Symmetry Breaking
A. Fuzfa, J. -M. Alimi
We build a mechanism of gravitational symmetry breaking (GSB) of a global U(1) symmetry based on the relaxation of the equivalence principle due to the mass variation of pseudo Nam…