4 papers
Vortices and rotating solitons in ultralight dark matter
Philippe Brax, Patrick Valageas
The dynamics of ultralight dark matter with non-negligible self-interactions are determined by a nonlinear Schrödinger equation rather than by the Vlasov equation of collisionless…
Screened Axio-dilaton Cosmology: Novel Forms of Early Dark Energy
Adam Smith, Philippe Brax, Carsten van de Bruck +2
We study the cosmology of multi-field Dark Energy, using a well-motivated axio-dilaton model that contains the minimal number of fields to have the 2-derivative sigma-model interac…
Detecting dark matter oscillations with gravitational waveforms
Philippe Brax, Clare Burrage, Jose A. R. Cembranos +1
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 expe…
A Minimal Axio-dilaton Dark Sector
Adam Smith, Maria Mylova, Philippe Brax +3
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) $\u…