Université Toulouse III - Paul Sabatier - Bat. 3R4 - 118 route de Narbonne - 31062 Toulouse Cedex 09 - France

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Non equilibrium physics with quantum fluids of light

Hot atomic vapors are widely used in non-linear and quantum optics due to their large Kerr non-linearity. This non-linearity induces effective photon-photon interactions allowing light to behave as a fluid displaying quantum properties such as superfluidity. In this presentation, I will show that we have full control over the Hamiltonian that drives the system and that we can engineer an analogue simulator with light. In particular, I will discuss 2 experiments:
1- Observation of a pre-thermal state in a 2D quantum fluid and the analogy with non-equilibrium BKT physics
2- Emergence of isotropy and inverse energy cascade in a 2D turbulent fluid light