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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-328@lptms.universite-paris-saclay.fr
DTSTART:20150121T143000Z
DTEND:20150121T160000Z
DTSTAMP:20150115T104710Z
URL:https://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lpt
 ms-grigory-astrakharchik/
SUMMARY:Séminaire du LPTMS : Grigory Astrakharchik - LPTMS\, salle 201\, 2
 ème étage\, Bât 100\, Campus d'Orsay - 21 Jan 15 14:30
DESCRIPTION:Lieb's soliton-like excitations in harmonic traps\nGrigory Astr
 akharchik (Universitat Politècnica de Catalunya\, Barcelona)\nWe study th
 e solitonic Lieb II branch of excitations the in one-dimensional Bose gas 
 in homogeneous and trapped geometry. Using Bethe-ansatz Lieb's equations w
 e calculate the "effective number of atoms'' and the "effective mass'' of 
 the excitation. The equations of motion of the excitation are defined by t
 he ratio of these quantities. The frequency of oscillations of the excitat
 ion in a harmonic trap is calculated. It changes continuously from its "so
 liton-like'' value $\\omega_h/\\sqrt{2}$ in the high density mean field re
 gime to $\\omega_h$ in the low density Tonks-Girardeau regime with $\\omeg
 a_h$ the frequency of the harmonic trapping. Particular attention is paid 
 to the effective mass of a soliton with velocity near the speed of sound.\
 nG. E. Astrakharchik and L. P. Pitaevskii Lieb’s soliton-like excitation
 s in harmonic traps EPL\, 102\, 30004 (2013)
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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