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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-437@lptms.universite-paris-saclay.fr
DTSTART:20160621T110000Z
DTEND:20160621T120000Z
DTSTAMP:20160601T100517Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-alessio-recati/
SUMMARY:Séminaire du LPTMS: Alessio Recati - LPTMS\, salle 201\, 2ème ét
 age\, Bât 100\, Campus d'Orsay - 21 Juin 16 11:00
DESCRIPTION:Coherently driven 2-component Bose gases\n\nAlessio Recati (Uni
 versità di Trento\, Italia)\n\nIn the present talk I will give an overvie
 w on the physics of 2-component Bose gases in presence of an spin exchange
  - Rabi - term. The Rabi term reduces the gauge symmetry of the system  a
 nd a gap opens for relative phase excitations. The latter has many consequ
 ences. In particular it  leads  to the formation of vortex dimers coupled
   through sine-Gordon solitons.  Results on the dynamics of the vortex di
 mer are presented.  The system exhibits also a second order  (quantum) pha
 se transition between a neutral (paramagnetic) and a  polarised (ferromagn
 etic) state\, provided the interspecies interaction is large enough.  I w
 ill discuss some phenomena related to the phase transition and to the  tw
 o phases   and the interplay  between Rabi coupling and density-density 
 interaction:\n\n (i) at a mean-field level for a continuous model - which 
 well described  atoms in a shallow trap. \n\n (ii) for a one-dimensional s
 ingle band Hubbard model - which should  properly describe atoms  confine
 d in an one-dimensional optical lattice.  
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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