3 papers
hep-th2001
From PCM to KDV and Back
Jonathan M. Evans
This is a summary of progress made in understanding the occurrence and properties of local, conserved, commuting charges in non-linear sigma-models, including principal chiral mode…
hep-th1995
Exact Results for Integrable Asymptotically-free Field Theories
Jonathan M. Evans, Timothy J. Hollowood
An account is given of a technique for testing the equivalence between an exact factorizable S-matrix and an asymptotically-free Lagrangian field theory in two space-time dimension…
hep-th1994
Geometry and Dynamics with Time-Dependent Constraints
Jonathan M. Evans, Philip A. Tuckey
We describe how geometrical methods can be applied to a system with explicitly time-dependent second-class constraints so as to cast it in Hamiltonian form on its physical phase sp…