Séminaire PMMH - Antonin Coutant (Univ. of Nottingham)

15 septembre 2017 11:00 » 12:00 — Bureau d’Etudes

A black hole in your bathtub

I will discuss the possibility to mimic black hole physics in fluid flows. The starting point is an analogy discovered by Unruh between the propagation of sound in a flowing fluid and waves around a black hole. In these analogue setups, it is possible to test various black hole effects.

I will focus on the case of the Hawking effect, through which a black hole loses its mass, and its recent experimental verifications. I will also present a recent water wave experiment, where we have observed the analogue of black hole superradiance, that is, the amplification of waves by extraction of angular momentum from a rotating flow.

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