Abstract
The analogy between the QCD vacuum - supposed to be a colour-magnetic superconductor - and the superconducting state, is exploited to estimate the reduction in average string tension experienced by hadrons in nuclei. This reduction leads to larger radii and softer one-body momentum distributions of quarks in nuclei, in qualitative agreement with experiment. The mechanism avoids colour-van der Waals forces that would otherwise arise from direct gluonic interactions between nucleons.
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