M. Bentaiba et al., FEYNMAN KLEINERT TREATMENT OF THE SUPERSYMMETRIC GENERALIZATION OF THE MORSE POTENTIAL, Physics letters. A, 189(6), 1994, pp. 433-438
The Feynman-Kleinert approximation to path-integrals, with systematic
corrections to the variational calculation of the effective classical
potential, is applied to the Morse oscillator generalized by supersymm
etry. It is found that this systematic improvement scheme of the Feynm
an-Kleinert approximation to path-integrals is extremely accurate.