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SUMMARY:Complex CFT in the O(n) Loop Model: Numerical Evidence for Loss of
  Conformality in the Large-n Limit
DTSTART:20231003T120000Z
DTEND:20231003T130000Z
DTSTAMP:20260523T013700Z
UID:indico-event-10460@indico.math.cnrs.fr
CONTACT:cecile@ihes.fr
DESCRIPTION:Speakers: Thomas Scaffidi (University of California Irvine)\n\
 nThe presence of nearby complex conformal field theories (CCFTs) hidden in
  the complex plane of the tuning parameter was recently proposed as an ele
 gant explanation for the ubiquity of "weakly first-order" transitions in c
 ondensed matter and high-energy systems. Recently\, we have numerically co
 nfirmed the presence of such a CCFT in a loop model which derives from a h
 igh-temperature formulation of the O(n) model. Surprisingly\, we found tha
 t the CCFT only survives until n=12.34\, beyond which the transfer matrix 
 acquires a gap. In this talk\, I will discuss ongoing work in trying to ex
 plain this loss of complex conformality at large n\, using a mapping to a 
 hard hexagon model for n going to infinity. I will also discuss the connec
 tion between the original O(n) model and its loop version and the conseque
 nces for CCFTs in these models. Pour être informé des prochains sémina
 ires vous pouvez vous abonner à la liste de diffusion en écrivant un mai
 l à sympa@listes.math.cnrs.fr avec comme sujet: "subscribe seminaire_phys
 ique PRENOM NOM"(indiquez vos propres prénom et nom) et laissez le corps 
 du message vide.\n\nhttps://indico.math.cnrs.fr/event/10460/
LOCATION:Amphithéâtre Léon Motchane (IHES)
URL:https://indico.math.cnrs.fr/event/10460/
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