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Using generalized Landau gauge, we study the continuous change of gluonproperties from the Landau gauge toward the Coulomb gauge in SU(3) lattice QCD.We investigate "instantaneous interquark potential", which is defined by thespatial correlation of the temporal link-variable $U_4$ and is an interestinggauge-dependent concept. In the Coulomb gauge, the instantaneous potential isexpressed by the Coulomb plus linear potential, where the slope is, however,2-3 times as large as the physical string tension. In the Landau gauge, theinstantaneous potential has no linear part. We find that the linear part iscontinuously growing by varying gauge from the Landau gauge toward the Coulombgauge. We also find that the instantaneous potential approximately reproducesthe physical interquark potential in a specific intermediate gauge,$\lambda_C$-gauge. This $\lambda_C$-gauge is expected to be a useful gauge formodeling effective theories such as the quark potential model.

Lattice QCD analysis for instantaneous interquark potential in generalized Landau gauge