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Based on the quark propagator in the instanton dilute liquid approximation,we calculate analytically the quark condensate $<\bar{q}q>$, the mixed quarkgluon condensate $g_{s}<\bar{q}G_{\mu\nu}\sigma^{\mu\nu}q>$ and the four quarkcondensate $<\bar{q} \Gamma q\bar{q} \Gamma q>$ at the mean field level in theframework of global color symmetry model. The numerical calculation shows thatthe values of these condensates are compatible with the ranges determined byother nonperturbative approaches. Moreover, we find that for nonlocal fourquark condensate the previous vacuum saturation assumption is not a goodapproximation even at the mean field level.Comment: 8 latex pages, no figure, Submitted to Phys. Rev.

Vacuum condensates in the global color symmetry model