T. Mukherjee et al., THE BERRY PHASE, NONLOCAL POTENTIALS AND COUPLED-CHANNEL PROBLEMS, Journal of physics. A, mathematical and general, 28(8), 1995, pp. 2353-2358
The Beny's phase for non-local potentials is studied, the salient diff
erences vis-a-vis the case of local potentials is discussed and the ge
neralization to the problem of coupled channels is presented.