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BEGIN:VEVENT
UID:1-96@lptms.universite-paris-saclay.fr
DTSTART:20130219T110000Z
DTEND:20130219T120000Z
DTSTAMP:20130418T124144Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-c-grenier/
SUMMARY:Séminaire du LPTMS: Charles Grenier - LPTMS\, salle 201\, 2ème é
 tage\, Bât 100\, Campus d'Orsay - 19 Fév 13 11:00
DESCRIPTION:Characterization and decoherence of minimal excitations\nCharle
 s Grenier\, CPhT Ecole Polytechnique\nThe recent years saw the development
 s of quantum optics experiments with electrons propagating along the edge 
 channels of two-dimensional electron gases in the quantum Hall regime [1].
  In this context\, the realization of single electron sources is necessary
  to observe analogues of the fundamental results of quantum optics\, such 
 as the Hong-Ou-Mandel effect. In the electronic context\, these experiment
 s would provide unprecendented insights on the behavior of electron gases 
 at the single-particle level [2]. In this talk\, I will present a theoreti
 cal study of the single electron coherence properties of two different typ
 es of voltage pulses [3\,4]. By combining bosonization and the Floquet sca
 ttering approach\, the effect of interactions on a periodic source of volt
 age pulses is computed exactly [5]. When such excitations are injected int
 o one of the channels of a system of two copropagating quantum Hall edge c
 hannels\, they fractionalize into pulses whose characteristics reflects th
 e properties of interactions. We show that the dependence of fractionaliza
 tion induced electron/hole pair production in the pulses amplitude contain
 s clear signatures of the fractionalization of the individual excitations.
  We propose an experimental setup combining a source of Lorentzian pulses 
 [3] and an Hanbury Brown and Twiss interferometer to measure interaction i
 nduced electron/hole pair production and more generally to reconstruct sin
 gle electron coherence of these excitations before and after their fractio
 nalization. [1] Y. Ji\, et al\, Nature 422\, 415 (2003) [2] P. Degiovanni\
 , et al\, Phys. Rev. B 80\, 241307(R) (2009) [3] L. Levitov\, et al\, J. M
 ath. Phys. 37\, 4845 (1996)\; D. A. Ivanov\, et al\, Phys. Rev. B 56\, 683
 9 (1997)\; J. Keeling\, et al\, Phys. Rev. Lett. 97\, 116403 (2006) [4] J.
  Dubois\, et al\, preprint ArXiv:1212.3921 [5] Ch. Grenier\, et al\, ArXiv
 :1301.6777
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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