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SUMMARY:Long-range Virasoro Minimal Models - Connor Behan (Perimeter Insti
 tute for Theoretical Physics)
DTSTART:20251023T130000Z
DTEND:20251023T143000Z
UID:TALK239881@talks.cam.ac.uk
DESCRIPTION:Nonlocal conformal field theory is the proper language for stu
 dying critical phenomena in systems with all-to-all interactions between s
 pins. It is also arises inevitably in defects which belong to local CFTs i
 n a higher dimensional space. Both of these concepts are exemplified by th
 e long-range Ising model which can be viewed as an interacting defect for 
 a free field in two different ways. One description is weakly coupled when
  the other is strongly coupled\, providing an instance of infrared duality
 . This talk will focus on efforts to establish a similar understanding for
  long-range versions of so called m-th minimal models where Ising is the c
 ase of m = 3. For one family\, a similar duality is known. For other famil
 ies\, finding one (or proving that it does not exist) is an open problem. 
 I will discuss a possible hint in the form of a stark difference between t
 hese families which arises at large m. Along the way\, we will also encoun
 ter some underappreciated technology for conformal perturbation theory.
LOCATION:Seminar Room 2\, Newton Institute
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