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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-422@lptms.universite-paris-saclay.fr
DTSTART:20160517T110000Z
DTEND:20160517T120000Z
DTSTAMP:20160315T102656Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-dmitry-savin/
SUMMARY:Séminaire du LPTMS: Dmitry Savin - LPTMS\, salle 201\, 2ème étag
 e\, Bât 100\, Campus d'Orsay - 17 Mai 16 11:00
DESCRIPTION:Probing eigenfunction nonorthogonality by parametric shifts of 
 resonance widths\nDmitry Savin (Brunel University\, Uxbridge\, UK)\nResona
 nces feature themselves in the energy-dependent S-matrix as its poles in t
 he complex energy plane. They can be analytically described as the complex
  eigenvalues of an effective non-Hermitian Hamiltonian. Notably\, the asso
 ciated resonance wavefunctions are known to be nonorthogonal\, which has m
 any important applications ranging from nuclear physics to quantum optics 
 and solid state. This talk will consider an open (scattering) quantum syst
 em under the action of a perturbation of its interior. It is demonstrated 
 that the resulting change of resonance widths is a sensitive indicator of 
 the nonorthogonality of resonance wavefunctions\, being zero only if those
  were orthogonal. Focusing further on chaotic systems\, we will introduce 
 a new type of parametric statistics in open systems\, and derive (within r
 andom matrix theory) the distribution of the resonance width shifts in the
  regime of weakly open system. Applications and recent data for microwave 
 cavities will be also discussed.
CATEGORIES:seminars
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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