[en] The aim of this work is to get a deeper understanding for the role of quantum and string shape fluctuations in a superconductor model of quark confinement. We consider the dual monopoly Nambu Jona Lasinio (MNJL) model with dual Dirac strings, which is an analogue of the BCS theory of superconductivity. Three essential physical quantities are calculated: the monopoly condensate, the string tension and the dual vector field condensate (corresponding to the gluon condensate). All these quantities have been calculated using path integral methods in the continuum. All the calculated quantities show a strong dependence on quantum fluctuations. (author)