We make use of the temporal gauge to construct a coherent state which is meant to describe the gluon condensate in the QCD vacuum under the assumption that the condensate is in a zero-momentum mode. The state so constructed is a color singlet and will yield finite, nonperturbative vacuum expectation values such as 〈vac‖:(${\mathrm{\alpha }}_{\mathrm{s}}$/π)${\mathrm{G}}_{\mathrm{\mu }\nu }^{\mathrm{a}}$(0)${\mathrm{G}}_{\mathrm{a}}^{\mathrm{\mu }\nu }$(0):‖vac〉. (This matrix element is found to have a value of about 0.012 ${\mathrm{GeV}}^4$ in QCD sum-rule studies.)

• Received 5 March 1987

DOI:https://doi.org/10.1103/PhysRevD.36.895