Zobrazeno 1 - 10
of 1 553
pro vyhledávání: '"A. Brax"'
Autor:
Brax, Philippe, Steer, Danièle A.
A scalar field coupled conformally and disformally to matter affects both the linear memory effect for binary systems on hyperbolic orbits, as well as the kick velocity for binaries on bound or unbound orbits. We study these corrections in detail, th
Externí odkaz:
http://arxiv.org/abs/2412.17938
Autor:
Brax, Philippe, Bruyère, Emma
We consider the effects of quartic self-interactions on the dynamics of a binary system due to a (nearly) massless scalar field conformally coupled to matter. We investigate the deviations from General Relativity at the conservative level and put a b
Externí odkaz:
http://arxiv.org/abs/2412.15092
We study the formation of solitons inside scalar-field dark matter halos with a non-polynomial self-interaction potential. We consider a self-interaction potential that is quartic in the scalar field in the low-density regime but saturates at large d
Externí odkaz:
http://arxiv.org/abs/2412.02519
Autor:
Smith, Adam, Mylova, Maria, Brax, Philippe, van de Bruck, Carsten, Burgess, C. P., Davis, Anne-Christine
In scalar-tensor theories it is the two-derivative sigma-model interactions that like to compete at low energies with the two-derivative interactions of General Relativity (GR) $\unicode{x2014}$ at least once the dangerous zero-derivative terms of th
Externí odkaz:
http://arxiv.org/abs/2410.11099
Autor:
Smith, Adam, Mylova, Maria, Brax, Philippe, van de Bruck, Carsten, Burgess, C. P., Davis, Anne-Christine
Axio-dilaton models are among the simplest scalar-tensor theories that contain the two-derivative interactions that naturally compete at low energies with the two-derivative inter-actions of General Relativity. Such models are well-motivated as the l
Externí odkaz:
http://arxiv.org/abs/2408.10820
Scalar field theories with a shift symmetry come equipped with the $K$-mouflage (or kinetic screening) mechanism that suppresses the scalar interaction between massive objects below a certain distance, the screening radius. In this work, we study the
Externí odkaz:
http://arxiv.org/abs/2407.08627
Autor:
Brax, P., Vanhove, P.
We consider the single-parameter $\mathcal{R}+ c\mathcal{R}^2$ gravitational action and use constraints from astrophysics and the laboratory to derive a natural relation between the coefficient $c$ and the value of the cosmological constant. We find
Externí odkaz:
http://arxiv.org/abs/2405.08145
Autor:
Brax, Philippe, Brun, Pierre
We study the effects of an oscillating axion field on the pressure between two metallic plates. We consider the situation where a magnetic field parallel to the plates is present and show that the electric field induced by the coupling of the axion t
Externí odkaz:
http://arxiv.org/abs/2404.18710
We consider the phase shift in the gravitational wave signal induced by fast oscillations of scalar dark matter surrounding binary systems, which could be probed by the future experiments LISA and DECIGO. This effect depends on the local matter densi
Externí odkaz:
http://arxiv.org/abs/2402.04819
Autor:
Brax, Philippe, Fichet, Sylvain
Publikováno v:
Physics 2024, 6(2), 544-567
We investigate the quantum forces occurring between the defects and/or boundaries of a conformal field theory (CFT). We propose to model imperfect defects and boundaries as localized relevant double-trace operators that deform the CFT. Our focus is o
Externí odkaz:
http://arxiv.org/abs/2312.02281