7 décembre 2017: 1 événement

  • Séminaires Math-Physique

    Jeudi 7 décembre 2017 16:16-17:20 - Antonin Coutant - School of Mathematical Sciences, University of Nottingham (UK).

    Séminaires Math-Physique : Black hole simulations in fluids

    Résumé : Since the work of Unruh in 1981, it is known that sound waves propagate
    in a moving fluid as waves in a black hole space-time. This allows us to
    test various effects of black hole physics in condensed matter systems. I will
    discuss the analogue of the Hawking radiation in these fluid models. Under
    some specific conditions, its thermal properties are recovered identically. On
    the other hand, in some configurations it can trigger new types of instabilities,
    such as the “black hole laser”. I will describe this this effect using a spectral
    approach and show that it is encoded in a set of eigen-values of a non-
    hermitian operator.

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