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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-178@lptms.universite-paris-saclay.fr
DTSTART:20131001T110000Z
DTEND:20131001T120000Z
DTSTAMP:20130923T101215Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-denis-basko/
SUMMARY:Séminaire du LPTMS: Denis Basko - LPTMS\, salle 201\, 2ème étage
 \, Bât 100\, Campus d'Orsay - 1 Oct 13 11:00
DESCRIPTION:Weak chaos and Arnold diffusion in the strongly disordered nonl
 inear Schroedinger chain\nDenis Basko\, LPMMC - Université Joseph Fourier
 \nI will discuss the long-time equilibration dynamics of a strongly disord
 ered one-dimensional chain of coupled weakly anharmonic classical oscillat
 ors\, which is one of the simplest models allowing to study the effect of 
 a classical nonlinearity on the Anderson localization. The system has chao
 tic behavior\, and it is shown that chaos in this system has a very partic
 ular spatial structure: it can be viewed as a dilute gas of chaotic spots.
  Each chaotic spot corresponds to a stochastic pump which drives the Arnol
 d diffusion of the oscillators surrounding it\, thus leading to their rela
 xation and thermalization. The most important mechanism of relaxation at l
 ong distances is provided by random migration of the chaotic spots along t
 he chain\, which bears analogy with variable-range hopping of electrons in
  strongly disordered solids.
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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