The Field Theory Limit of Integrable Lattice Models
Abstract
The lightcone approach is reviewed. This method allows to find the underlying quantum field theory for any integrable lattice model in its gapless regime. The relativistic spectrum and Smatrix follows straightforwardly in this way through the Bethe Ansatz. We show here how to derive the infinite number of local commuting and nonlocal and noncommuting conserved charges in integrable QFT, taking the massive Thirring model (sineGordon) as an example. They are generated by quantum monodromy operators and provide a representation of $q$deformed affine Lie algebras $U_q({\hat\G})$. Based on lectures delivered at the $XXX_q$ Karpacz Winter School, Poland, February 1426, 1994.
 Publication:

arXiv eprints
 Pub Date:
 June 1994
 arXiv:
 arXiv:hepth/9406135
 Bibcode:
 1994hep.th....6135D
 Keywords:

 High Energy Physics  Theory
 EPrint:
 21 pages, Latex, LPTHE preprint 9426. Figures available from the author under request