Classically integrable field theories with defects
arXiv:hep-th/0305022 · doi:10.1142/S0217751X04020324
Abstract
Some ideas and remarks are presented concerning a possible Lagrangian approach to the study of internal boundary conditions relating integrable fields at the junction of two domains. The main example given in the article concerns single real scalar fields in each domain and it is found that these may be free, of Liouville type, or of sinh-Gordon type.
11 pages. Based on a talk given at the 6th International Workshop on Conformal Field Theory and Integrable Systems, Landau Institute, Chernogolovka, 15-21 September, 2002. Two references corrected