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UID:DSC-22777
DTSTART;TZID=Europe/Berlin:20260320T170000
SEQUENCE:1773988651
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20260320T180000
URL:https://www.dresden-science-calendar.de/calendar/en/detail/22777
LOCATION:MPI-PKS\, Nöthnitzer Straße 3801187 Dresden
SUMMARY:Walther: CondMat for Dummies: The BKT transition with and without l
 ong-range couplings
CLASS:PUBLIC
DESCRIPTION:Speaker: Luis Walther\nInstitute of Speaker: MPIPKS\nTopics:\nP
 hysik\n Location:\n  Name: MPI-PKS ()\n  Street: Nöthnitzer Straße 38\n 
  City: 01187 Dresden\n  Phone: + 49 (0)351 871 0\n  Fax: \nDescription: Th
 e Berezinskii–Kosterlitz–Thouless (BKT) transition in the two-dimensio
 nal XY model stands as the first example of a topological phase transition
  outside of the celebrated Landau paradigm. In this talk\, I will first in
 troduce the XY model and provide an intuitive derivation of the BKT transi
 tion based on a Landau–Peierls–type argument. This perspective highlig
 hts how spin waves destabilize long-range order and how the decoupling of 
 vortices drives a qualitatively new type of phase transition. Further\, I 
 will turn to a more realistic setting by incorporating long-range interact
 ions\, which are frequently encountered in experimental systems. I will an
 alyze the effect of long-range interactions on the model and argue that th
 e essential features of the BKT transition remain robust\, persisting even
  in the presence of arbitrary long-range interactions.
DTSTAMP:20260611T224840Z
CREATED:20260319T063624Z
LAST-MODIFIED:20260320T063731Z
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