New instantons in the double-well potential
arXiv:hep-th/0010130 · doi:10.1016/S0370-2693(01)00012-0
Abstract
A new instanton solution is found in the quantum-mechanical double-well potential with a four-fermion term. The solution has finite action and depends on four fermionic collective coordinates. We explain why in general the instanton action can depend on collective coordinates.
10 pages, clarifications and references added