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Last name: LARRÉ
First name: Pierre-Élie
National audience
We present theoretical results concerning the critical velocity for dissipationless motion of a two-dimensional nonlinear Schrödinger superfluid past a static obstacle represented by a repulsive potential of large width. In contrast to most of the state of the art, our study is not restricted to an impenetrable obstacle potential nor to a...
We consider in this work the different possible stationary flows of a one dimensional quantum fluid in the mean-field regime. We focus on the supersonic regime where a transition from a time dependent flow to a stationary diffractive flow occurs at a given critical velocity. We give nonperturbative results for this critical velocity in the...
In the presence of interactions, periodically driven quantum systems generically thermalize to an infinite-temperature state. Recently, however, it was shown that in random kicked rotors with local interactions, this long-time equilibrium could be strongly delayed by operating in a regime of weakly fluctuating random phases, leading to the...
Quantum fluids of light merge many-body physics and nonlinear optics, revealing quantum hydrodynamic features of light when it propagates in a nonlinear media. One of the most outstanding evidence of light behaving as an interacting fluid is its ability to carry itself as a super-fluid. Here, we report a direct experimental detection of the...
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 hydrodynamic regimes observed are organised in a unique phase diagram involving the velocity of the flow and the diameter of the obstacle. Then, we focus on...
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 hydrodynamic regimes observed are organised in a unique phase diagram involving the velocity of the flow and the diameter of the obstacle. Then, we focus on...