L. Baulieu et E. Rabinovici, ON THE CALCULABILITY OF OBSERVABLES IN TOPOLOGICAL QUANTUM-MECHANICALMODELS, Physics letters. Section B, 316(1), 1993, pp. 93-101
We consider a superconformal quantum mechanical system which has been
chosen on the basis of a local BRST topological invariance. We suggest
that it truly leads to topological observables which we compute. The
absences of a ground state and of a mass gap are special features of t
his system.