TY - INPR
A1 - Liang, Jui-Qing
A1 - MÃ¼ller-Kirsten, H. J. W.
A1 - Zimmerschied, F.
A1 - Zhou, Jiang-Ge
T1 - BRST-Invariant Approach to Quantum Mechanical Tunneling
N2 - A new approach with BRST invariance is suggested to cure the degeneracy problem of ill defined path integrals in the path- integral calculation of quantum mechanical tunneling effects in which the problem arises due to the occurrence of zero modes. The Faddeev-Popov procedure is avoided and the integral over the zero mode is transformed in a systematic way into a well defined integral over instanton positions. No special procedure has to be adopted as in the Faddeev-Popov method in calculating the Jacobian of the transformation. The quantum mechanical tunneling for the Sine-Gordon potential is used as a test of the method and the width of the lowest energy band is obtained in exact agreement with that of WKB calculations.
Y1 - 1995
UR - https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/883
UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:386-kluedo-8499
ER -