188 citations · 747 across the 28 of their papers we have counts for
5 papers · 1 filter
Controlling and observing nonseparability of phonons created in time-dependent 1D atomic Bose condensates
Scott Robertson, Florent Michel, Renaud Parentani
We study the spectrum and entanglement of phonons produced by temporal changes in homogeneous one-dimensional atomic condensates. To characterize the experimentally accessible chan…
Radial excitations of current-carrying vortices
Betti Hartmann, Florent Michel, Patrick Peter
We report on the existence of a new type of cosmic string solutions in the Witten model with U(1)xU(1) symmetry. These solutions are superconducting with radially excited condensat…
Phonon spectrum and correlations in a transonic flow of an atomic Bose gas
Florent Michel, Jean-François Coupechoux, Renaud Parentani
Motivated by a recent experiment of J.~Steinhauer, we reconsider the spectrum and the correlations of the phonons spontaneously emitted in stationary transonic flows. The latter ar…
Scattering of gravity waves in subcritical flows over an obstacle
Scott Robertson, Florent Michel, Renaud Parentani
We numerically study the scattering coefficients of linear water waves on stationary flows above a localized obstacle. We compare the scattering on trans- and subcritical flows, an…
Dynamical instabilities and quasi-normal modes, a spectral analysis with applications to black-hole physics
Antonin Coutant, Florent Michel, Renaud Parentani
Black hole dynamical instabilities have been mostly studied in specific models. We here study the general properties of the complex-frequency modes responsible for such instabiliti…