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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-494@lptms.universite-paris-saclay.fr
DTSTART:20170214T110000Z
DTEND:20170214T120000Z
DTSTAMP:20170207T144643Z
URL:https://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lpt
 ms-duo-xiangyu-cao-kirill-plekhanov/
SUMMARY:Séminaire du LPTMS: duo Xiangyu Cao &amp\; Kirill Plekhanov - LPTM
 S\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay - 14 Fév 17 11:0
 0
DESCRIPTION:``Liouville field theory and log-correlated Random Energy Model
 s'' by Xiangyu Cao (LPTMS\, Université Paris-Sud)\nAn exact mapping is es
 tablished between the c ≥ 25 Liouville field theory (LFT) and the\nGibbs
  measure statistics of a thermal particle in a 2D Gaussian Free Field plus
  a logarithmic\nconfining potential. The probability distribution of the p
 osition of the minimum of the energy\nlandscape is obtained exactly by com
 bining the conformal bootstrap and one-step replica sym-\nmetry breaking m
 ethods. Operator product expansions in LFT allow to unveil novel universal
 \nbehaviours of the “log-correlated Random Energy Models” class. Appli
 cations will include multi-\nfractality (inverse participation ratios and 
 their corrections) and the overlap distribution in the\ndirected polymer o
 n a Cayley tree model.\n\nRef.: Xiangyu Cao\, Pierre Le Doussal\, Alberto 
 Rosso and Raoul Santachiara\, preprint arXiv:1611.02193.\n\n&nbsp\;\n``Chi
 ral spin state of the frustrated XY model on the honeycomb lattice'' by Ki
 rill Plekhanov (LPTMS\, Université Paris-Sud)\nAbstract: Currently\, it w
 as suggested that the frustrated XY model for spin-1/2 on the honeycomb la
 ttice can support a chiral spin liquid (CSL) phase\, that is characterized
  by the spontaneous breaking of the time-reversal and parity symmetries. T
 he ground state of the system in the CSL phase will be characterized by th
 e gapped bulk and gapless chiral modes along the edges\, if open boundary 
 conditions are used. In this talk I will present analytical arguments that
  lead to this conclusion and a numerical verification of analytical result
 s based on the calculations of local order parameters\, structure factors 
 and scalar spin chirality using the exact diagonalization technique. An ex
 perimental realization of the model in the context of ultra-cold atoms and
  circuit-QED systems\, based on the application of time-dependent periodic
  (Floquet) modulations\, will be discussed.
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
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  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
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