Abstract
Nonperturbative vacuum polarization effects are explored for a supercritical Coulomb source with [Formula: see text] in 1[Formula: see text]+[Formula: see text]1D. Both the vacuum charge density [Formula: see text] and vacuum energy [Formula: see text] are considered. It is shown that in the overcritical region the behavior of vacuum energy could be significantly different from perturbative quadratic growth up to decrease reaching large negative values.
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