Himmerich, M.; Dongen, P. G.J. van; Noack, R. M. - In: The European Physical Journal B - Condensed Matter and … 51 (2006) 1, pp. 5-15
A nonperturbative method for calculating persistent currents in molecules and nanoscopic quantum rings is presented. Starting from the extended Hubbard model on a ring threaded by an Aharonov-Bohm flux, a feedback term through which the current can generate magnetic flux is added. Another...