Abstract
Abstract In field strength formulated QCD the effective quark interaction induced by gluon condensation is investigated in a next to leading order strong coupling expansion. The quark condensate is calculated as a function of the current quark mass. A first order phase transition is seen at current mass of m [1 GeV] = 70 MeV. Within a NJL type model designed to mimic the essential features of the gluon induced quark interaction it is shown that the phase transition is due to repulsive parts of the quark interaction.
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