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UID:0-829@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20220614T110000
DTEND;TZID=Europe/Paris:20220614T120000
DTSTAMP:20220601T172751Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-grigori-astrakharchik-upc/
SUMMARY:Séminaire du LPTMS : Grigori Astrakharchik (UPC-BQMC) - Salle des 
 séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 14 Juin 22 11:
 00
DESCRIPTION:Formation of liquids in low-dimensional dipolar systems\nGrigor
 i Astrakharchik (Barcelona Tech - UPC)\nHybrid: onsite seminar + zoom.\n\n
 https://cnrs.zoom.us/j/95875919260?pwd=eW4vK2JwV05BNnh3bWoyVlMveVVTZz09\n\
 nMeeting ID: 958 7591 9260\nPasscode: 4Jq11e\n\nWe show that ultradilute q
 uantum liquids can be formed with ultracold bosonic dipolar atoms in a bil
 ayer geometry. Contrary to previous realizations of ultradilute liquids\, 
 there is no need for stabilizing the system with an additional repulsive s
 hort-range potential. The advantage of the proposed system is that dipolar
  interactions on their own are sufficient for creation of a self-bound sta
 te and no additional short-range potential is needed for the stabilization
 . We perform quantum Monte Carlo simulations and find a rich ground-state 
 phase diagram that contains quantum phase transitions between liquid\, sol
 id\, atomic gas\, and molecular gas phases.\n\nOptical lattices with dipol
 ar bosons provide a unique platform for fundamental studies of the extende
 d Bose-Hubbard model. The interplay between anisotropic long-range interac
 tion\, strong on-site repulsion and periodic confinement give rise to unex
 pected phases of matter that have not been explored so far in experiments.
  We propose a mechanism that stabilizes quantum liquids in strongly intera
 cting dipolar gases in a one-dimensional optical lattice. The mechanism is
  based on the enhanced role of the superexchange processes close to a self
 -bound Mott insulator state. To support this finding\, we contrast our per
 turbative calculations with full density-matrix renormalization group simu
 lations and characterize the properties of different phases of the system.
 \n\n[1] G. Guijarro\, G. E. Astrakharchik\, J. Boronat\, Ultradilute quant
 um liquid of dipolar atoms in a bilayer\, Phys. Rev. Lett. 128\, 063401 (2
 022)\n\n[2] Ivan Morera\, Rafał Ołdziejewski\, Grigori E. Astrakharchik\
 , Bruno Juliá-Díaz\, Superexchange liquefaction of strongly correlated l
 attice dipolar bosons\, arXiv:2204.03906
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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