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SUMMARY:“Irrational CFTs from coupled anyon chains?” by António Antun
 es\, LPENS Paris
DTSTART;VALUE=DATE:20251201
DTSTAMP:20260512T015618Z
UID:b9ab11c58b34de36b81c6fede1021ecc5dcebd41c8a848c88f06b2e5
CATEGORIES:Conferences - Seminars
DESCRIPTION:Irrational CFTs in 1+1d with a discrete spectrum and no conser
 ved currents other than the stress-tensor are expected to be generic\, uns
 olvable by standard methods\, and hard to construct explicitly. In this ta
 lk\, I will discuss a lattice model that realizes a candidate for such a C
 FT as a conformal phase of matter without fine-tuning. The model is constr
 ucted by coupling N ≥ 3 golden anyon chains together\, preserving N copi
 es of the Fibonacci non-invertible symmetry. I will briefly describe the N
 =2 case\, where a weakly first-order phase transition (previously misident
 ified as an irrational CFT) occurs and some non-trivial (but rational) CFT
 s appear as unstable fixed points. For N = 3 we will show that a short RG
  flow occurs towards a stable CFT in the infrared with c~2.09. We indirect
 ly argue that the CFT is irrational by comparing with a list of known rati
 onal CFTs with similar central charge. We will end with a discussion of ot
 her approaches that could be used to confirm/disprove our claim. 
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727 https://epfl.zoom.u
 s/j/69362612859
STATUS:CONFIRMED
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