  We work perturbatively with an interacting quantum field theory comprised of
two distinct scalar fields. In this theory, we introduce a sudden quench of the
mass of one of the scalars at time $t_0$. Also, the quartic interaction between
the two scalars is turned on at time $t_{in}$. These break time-translation
invariance. In this setup we examine the effects of the relative ordering of
$t_0$ and $t_{in}$ on composite operator mixing. We study how such operator
mixing affect features of the scalar potential. We find that the late time
effective potential can be sensitive enough to the quenches to trigger phase
transitions.
