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TZID:Europe/Paris
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UID:1-226@lptms.universite-paris-saclay.fr
DTSTART:20140203T143000Z
DTEND:20140203T153000Z
DTSTAMP:20140121T145702Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/tri-seminaire-de-
 physique-statistique-martin-evans/
SUMMARY:Tri-séminaire de Physique Statistique : Martin Evans - IPhT\, CEA-
 Saclay\, salle Itzykson - 3 Fév 14 14:30
DESCRIPTION:Speed selection in coupled Fisher waves\nMartin Evans\, Univers
 ity of Edinburgh\, Institute for Condensed Matter and Complex Systems\, Sc
 hool of Physics\nThe Fisher equation describes the spread of a population 
 or the spread of an advantageous gene through a population. It is well kno
 wn as a simple nonlinear equation which exhibits travelling wave solutions
 . Within statistical physics It has played a major role in our understandi
 ng of phase ordering dynamics and random first order phase transitions. In
  this talk we review the selection mechanism for the speed of the travelli
 ng waves which was established some time ago. We go on to consider two cou
 pled Fisher equations representing two populations e.g. sub-populations of
  bacteria which are susceptible or resistant to antibiotic. We show that a
  subtle coupling between two population waves gives rise to a novel speed 
 selection mechanism.
LOCATION:IPhT\, CEA-Saclay\, salle Itzykson\, CEA - Saclay\, Saclay\, Franc
 e
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 3668,2.180033999999978
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