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UID:763@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20160708T130000
DTEND;TZID=Europe/Berlin:20160708T140000
DTSTAMP:20160706T100407Z
URL:https://qft.physik.hu-berlin.de/next-seminars/francesco-ravanini-bolog
 na-u/
SUMMARY:Francesco Ravanini (Bologna U) - Entanglement Entropy from Corner T
 ransfer Matrix in Forrester Baxter non-unitary RSOS models 
DESCRIPTION:&nbsp\;\n\n&nbsp\;\n\nUsing a Corner Transfer Matrix approach\,
  we compute the bipartite entanglement Rényi entropy in the off-critical 
 perturbations of non-unitary conformal minimal models realised by lattice 
 spin chains Hamiltonians related to the Forrester Baxter RSOS models in re
 gime III. This allows to show on a set of explicit examples that the Rény
 i entropies for non-unitary theories rescale near criticality as the logar
 ithm of the correlation length with a coefficient proportional to the effe
 ctive central charge. This complements a similar result\, recently establi
 shed for the size rescaling at the critical point\, showing the expected a
 greement of the two behaviours. We also compute the first subleading unusu
 al correction to the scaling behaviour\, showing that it is expressible in
  terms of expansions of various fractional powers of the correlation lengt
 h\, related to the differences Δ−Δmin between the conformal dimensions
  of fields in the theory and the minimal conformal dimension. Finally\, a 
 few observations on the limit leading to the off-critical logarithmic mini
 mal models of Pearce and Seaton are put forward.
CATEGORIES:Research Seminars
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