Outputs (3)

Nonlinearities induced by parametric resonance in effectively 1D atomic Bose condensates (2018)
Journal Article
Robertson, S., Michel, F., & Parentani, R. (2018). Nonlinearities induced by parametric resonance in effectively 1D atomic Bose condensates. Physical Review D, 98(5), Article 056003. https://doi.org/10.1103/physrevd.98.056003

We present a numerical study of the dynamical effects following a sudden change of the transverse trapping frequency in an elongated Bose-Einstein condensate, which induces periodic oscillations of the radial density. At early times, we observe an ex... Read More about Nonlinearities induced by parametric resonance in effectively 1D atomic Bose condensates.

Relativistic collapse of axion stars (2018)
Journal Article
Michel, F., & Moss, I. G. (2018). Relativistic collapse of axion stars. Physics Letters B, 785, 9-13. https://doi.org/10.1016/j.physletb.2018.07.063

We study the gravitational collapse of axion dark matter in null coordinates, assuming spherical symmetry. Compared with previous studies, we use a simpler numerical scheme which can run, for relevant parameters, in a few minutes or less on a desktop... Read More about Relativistic collapse of axion stars.

Gravity waves on modulated flows downstream from an obstacle: The transcritical case (2018)
Journal Article
Michel, F., Parentani, R., & Robertson, S. (2018). Gravity waves on modulated flows downstream from an obstacle: The transcritical case. Physical Review D, 97(6), Article 065018. https://doi.org/10.1103/physrevd.97.065018

Periodic spatial modulations arise in analogue gravity experiments aimed at detecting the analogue version of the Hawking effect in a white-hole flow. Having the same spatial periodicity as low-frequency dispersive modes, they can induce resonances w... Read More about Gravity waves on modulated flows downstream from an obstacle: The transcritical case.