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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-347@lptms.universite-paris-saclay.fr
DTSTART:20150331T110000Z
DTEND:20150331T120000Z
DTSTAMP:20150311T151216Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-vincent-michal/
SUMMARY:Séminaire du LPTMS: Vincent Michal - LPTMS\, salle 201\, 2ème ét
 age\, Bât 100\, Campus d'Orsay - 31 Mar 15 11:00
DESCRIPTION:Many-body physics of bosons in (quasi)disorder\nVincent Michal 
 (LPTMS)\nAnderson's localization was introduced more than fifty years ago 
 in the context of single-particle physics: the eigenstates of the Shrödin
 ger equation with a random potential may be localized in space leading to 
 the absence of particle transport. It was realized quite recently that the
  localization idea is actually much more general and applies to a variety 
 of situations. This program was put forward to solve the problem of electr
 on lifetime in a quantum dot and lead to the discovery of the many-body lo
 calization physics (Anderson localization in the many-body Fock space). In
  the solid state context this approach has proven to be very useful to tac
 kle the long-standing problem of the transport of interacting localized si
 ngle-particle states in the absence of phonons. This gave rise to the demo
 nstration of the energy threshold between the insulating and metallic regi
 mes [1]. The physics of interacting bosons [2] is also very interesting pa
 rticularly in connection with ongoing experiments on cold atomic gases. In
  this seminar I would like to show to you very recent results on the finit
 e-temperature fluid-insulator transition of bosons in one dimension (1D). 
 On the one hand I will present the case of the quasiperiodic potential (su
 perposition of two incommensurate periodic potentials) and give prediction
 s regarding the transport phase diagram including the unexpected freezing 
 with heating behaviour [3]. On the other hand I will talk about the transp
 ort of strongly-interacting 1D bosons in the random potential and I will s
 how the reentrance of the insulating state at strong interaction\, hence c
 ompleting the transport phase diagram of interacting disordered bosons at 
 finite temperature [4].\n\nReferences:\n[1] D.M. Basko\, I.L. Aleiner\, an
 d B.L. Altshuler\, Metal–insulator transition in a weakly interacting ma
 ny-electron system with localized single-particle states\, Annals of Physi
 cs 321\, 1126 (2006). See references therein.\n[2] I. L. Aleiner\, B. L. A
 ltshuler\, and G. V. Shlyapnikov\, A finite-temperature phase transition f
 or disordered weakly interacting bosons in one dimension\, Nature Physics 
 6\, 900 (2010).\n[3] V.P. Michal\, B.L. Altshuler and G.V. Shlyapnikov\, D
 elocalization of Weakly Interacting Bosons in a 1D Quasiperiodic Potential
 \, Phys. Rev. Lett. 113\, 045304 (2014).\n[4] V.P. Michal\, I.L. Aleiner\,
  B.L. Altshuler\, G.V. Shlyapnikov\, Finite-Temperature Fluid-Insulator Tr
 ansition of Strongly Interacting 1D Disordered Bosons\, arXiv:1502.00282.
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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