Integrable hierarchies from BRST-anti-BRST gauge-fixing
arXiv:hep-th/0011162
Abstract
The BRST formulation is used in order to derive the existence criterion for classical bi-Hamiltonian systems, based on non-anomalous deformation of the gauge-fixing structure. The recursion operator is then used to provide the entire hierarchy of integrable models associated to the original BRST and anti-BRST charges.
7 pages