Perturbed Defects and T-Systems in Conformal Field Theory

  title={Perturbed Defects and T-Systems in Conformal Field Theory},
  author={Ingo Runkel},
Defect lines in conformal field theory can be perturbed by chiral defect fields. If the unperturbed defects satisfy su(2)-type fusion rules, the operators associated to the perturbed defects are shown to obey functional relations known from the study of integrable models as T-systems. The procedure is illustrated for Virasoro minimal models and for Liouville theory. Dedicated to the memory of Alexei Zamolodchikov. Email: 

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