The subject of this study is the long-time equilibration dynamics of a strongly disordered one-
dimensional chain of coupled weakly anharmonic classical oscillators. It is shown that chaos …

We experimentally explore the rich variety of nonlinear coherent structures arising in a
turbulent flow of superfluid light past an obstacle in an all-optical configuration. The different …

We study the Anderson localization of Bogoliubov quasiparticles (elementary many-body
excitations) in a weakly interacting Bose gas of chemical potential μ subjected to a …

We determine in a nonperturbative way the critical velocity for superfluidity of a generic
quantum fluid flowing past a localized obstacle in the one-dimensional mean-field regime …

The hallmark of superfluidity is the appearance of “vortex states” carrying a quantized
metastable circulating current. Considering a unidirectional flow of particles in a ring, at first …

We study theoretically Bloch oscillations of half-matter, half-light quasiparticles: exciton-
polaritons. We propose an original structure for the observation of this phenomenon despite …

We theoretically investigate the critical velocity for dissipationless motion of a two-
dimensional superfluid past a static potential barrier of large width. The circular-shaped …

The triangular Bose-Hubbard trimer is topologically the minimal model for a BEC superfluid
circuit. As a dynamical system of two coupled freedoms it has mixed phase space with …

We analyze the outcoupling of a matter wave into a guide by a time-dependent spilling of the
atoms from an initially trapped Bose-Einstein condensate. This process yields intrinsically a …

Periodically-driven quantum systems make it possible to reach stationary states with new
emerging properties. However, this process is notoriously difficult in the presence of …