BOHM TRAJECTORY AND FEYNMAN PATH APPROACHES TO THE TUNNELING TIME PROBLEM

A comparison is made between the Bohm trajectory and Feynman path appr oaches to the long-standing problem of determining the average time ta ken for a particle described by the Schrodinger wave function psi to t unnel through a potential barrier. The former approach follows simply and uniquely from the basic postulates of Bohm's causal interpretation of quantum mechanics; the latter is intimately related to the most fr equently cited approaches based on conventional interpretations. Empha sis is given to the fact the fundamentally different transmission (T)- reflection (R) decompositions, particlelike and wavelike respectively, are central to the two methods: \psi\(2) = [\psi\(2)](T) + [\psi\(2)] (R) (Bohm trajectory approach); psi = psi(T) + psi(R) (Feynman path ap proach).