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TZID:Europe/Paris
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UID:1-180@lptms.universite-paris-saclay.fr
DTSTART:20130923T110000Z
DTEND:20130923T121500Z
DTSTAMP:20130917T115357Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-fluides
 -quantiques-du-lptms-shimshon-bar-ad/
SUMMARY:Séminaire exceptionnel du LPTMS : Shimshon Bar-Ad - LPTMS\, salle 
 201\, 2ème étage\, Bât 100\, Campus d'Orsay - 23 Sep 13 11:00
DESCRIPTION:Transonic flow of light\, sonic horizons and analogue gravity 
 \nShimshon Bar-Ad\, Tel Aviv University\nIn 1981 W.G. Unruh predicted that
  a thermal spectrum of sound waves would be emitted from the sonic horizon
  in transonic fluid flow\, in analogy to black-hole evaporation. Based on 
 this idea\, extended to the realm of nonlinear optics\, we explore an opti
 cal analog of the Laval nozzle\, in which light propagation through a suit
 ably shaped waveguide\, filled with a self-defocusing nonlinear medium\, m
 imics the transonic acceleration of a real fluid expanding through a propu
 lsive exhaust nozzle. Experimental demonstrations of transonic flow in pro
 totype optical nozzles will be presented\, and the prospect of observing f
 luctuations that are classical analogs of Hawking radiation will be discus
 sed.
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
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  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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