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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-132@lptms.universite-paris-saclay.fr
DTSTART:20130618T110000Z
DTEND:20130618T120000Z
DTSTAMP:20130628T083036Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-rodolfo-jalabert/
SUMMARY:Séminaire du LPTMS: Rodolfo Jalabert - LPTMS\, salle 201\, 2ème 
 étage\, Bât 100\, Campus d'Orsay - 18 Juin 13 11:00
DESCRIPTION:Scattering Phase of Quantum Dots: Emergence of Universal Behavi
 or\nRodolfo Jalabert\, Institut de Physique et Chimie des Materiaux de St
 rasbourg\nIn a coherent conductor like a quantum dot\, the transmission ph
 ase is of key importance in determining the transport properties. Unlike t
 he conductance\, the transmission phase is not directly measurable. Nevert
 heless\, phase-sensitive experiments have been performed by embedding a qu
 antum dot in one of the arms of an Aharonov-Bohm interferometer. These exp
 eriments\, observing in-phase behavior between consecutive Coulomb-blockad
 e resonances\, have remained unexplained for more than a decade. We provid
 e a solution of this puzzle by showing that wave-function correlations exi
 sting in chaotic ballistic quantum dots are responsible for the emergence 
 of large universal sequences of in-phase resonances in the short wavelengt
 h limit [1]. In quantum dots with at least one hundred electrons the descr
 iption of Coulomb blockade physics within a constant charging energy model
  allows for an effective one-particle description. Smaller dots require go
 ing beyond mean-field approaches by including the effect of electronic cor
 relations. We develop a numerical method\, using the Density Matrix Renorm
 alization Group algorithm\, in order to obtain the transmission phase of a
  strongly interacting system. We demonstrate that electronic correlations 
 do not generically lead to the in-phase behavior and that small dots are a
 lways in the mesoscopic regime of random relative transmission phases [2].
 \n[1] R.A. Molina\, R.A. Jalabert\, D. Weinmann\, and Ph. Jacquod\; Phys. 
 Rev. Lett. 108\, 076803 (2012).\n[2] R.A. Molina\, P. Schmitteckert\, D. W
 einmann\, R.A. Jalabert\, and Ph. Jacquod\; arXiv:1212.2114 (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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