BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//6.4.7.2//EN
TZID:Europe/Paris
X-WR-TIMEZONE:Europe/Paris
BEGIN:VEVENT
UID:0-701@lptms.universite-paris-saclay.fr
DTSTART:20190916T110000Z
DTEND:20190916T120000Z
DTSTAMP:20190905T093241Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/journal-club-serg
 uei-brazovskii-2/
SUMMARY:Journal club: Serguei Brazovskii - Salle des séminaires du FAST et
  du LPTMS\, bâtiment Pascal n°530 - 16 Sep 19 11:00
DESCRIPTION:When the intuition betrays or saves: messages from the 1d world
 \n\n\nAbstract : Series of two lectures with four excursions\n\nTheory of 
 (quasi) one-dimensional electronic systems attracts us thanks to its speci
 al facilities but also because of some specific curiosities. In these excu
 rsions we shall meet some examples of not quite expected relations\, diffi
 culties and even mistakes which one can pickup from the half-a-century his
 tory of this field.\nFirst excursion will descend to the contradictory sto
 ry of Luttinger liquid with its curiosities in historical \, personal and 
 linguistic aspects. It will also introduce the once unattended role of so 
 called chiral or Schwinger anomalies.\nSecond excursion will meet the chir
 al anomalies as they appear already in simplest\, MF or BCS types\, models
  particularly at finite temperatures when normal excitations are present. 
 The resulting effective Ginzburg-Landau theory will prove to be quite diff
 erent from what is commonly expected.\nThird excursion will undermine the 
 common belief of the spin-charge separation which is seemingly endorsed by
  the bosonization and exact solutions. Actually\, spin excitations must ca
 rry the electric current as it takes place for free fermions. The resoluti
 on comes from correct definition of current carrying states and current op
 erators taking into account the band curvature.\nForth excursion will lead
  to the early days when 1D models were studies to understand the phase dia
 gram of real quasi-1D systems. We will see that\, unlike the common belief
 s\, the 1D (g-ological) phase diagram based upon diverging power-law susce
 ptibilities\, does not want at all to reproduce itself when electrons acqu
 ire a bandwidth in interchain directions. The system falls to the Fermi-li
 quid regime unless the “imaginary gaps” appear from external symmetry 
 lowering due to the crystal field of the magnetic field.\n\n
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
END:VEVENT
END:VCALENDAR