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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-594@lptms.universite-paris-saclay.fr
DTSTART:20180522T110000Z
DTEND:20180522T120000Z
DTSTAMP:20180509T075130Z
URL:https://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lpt
 ms-marcel-filoche/
SUMMARY:Séminaire du LPTMS: Marcel Filoche - LPTMS\, salle 201\, 2ème ét
 age\, Bât 100\, Campus d'Orsay - 22 Mai 18 11:00
DESCRIPTION:Localization landscape and localization potential in disordered
  or complex structures\nMarcel Filoche (Laboratoire de Physique de la Mati
 ère Condensée\, Ecole Polytechnique)\nStanding waves in disordered or co
 mplex systems can be subject to a strange and intriguing phenomenon which 
 has puzzled the physics and mathematical communities for more than 60 year
 s\, namely wave localization. This phenomenon consists of a concentration 
 (or a focusing) of the wave energy in a very restricted sub-region of the 
 entire domain. It has been evidenced experimentally in mechanics\, acousti
 cs and quantum physics. Determining the conditions for the onset of locali
 zation\, depending on the disorder amplitude\, the energy\, or the wave ty
 pe\, is the aim of many theoretical studies. We will present a theory that
  unifies different types of localization within a single mathematical fram
 ework [1]. To that end\, we will introduce the notion of "localization lan
 dscape"\, solution to an associated Dirichlet problem. Going further\, thi
 s will enable us to define an "effective localization potential"\, providi
 ng a new insight into the confinement of the waves in disordered media. Th
 is potential allows us to predict the localization region\, the energies o
 f the localized modes\, the density of states\, and the long range decay o
 f the wave functions. We will present experimental and numerical examples 
 of this theory in mechanics\, in semiconductor physics\, and in molecular 
 systems\, as well as theoretical perspectives with cold atom systems.\n\n[
 1] M. Filoche and S. Mayboroda\, Universal mechanism for Anderson and weak
  localization\,  PNAS 109\, 14761–14766 (2012).
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  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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