  We show the heat kernel type variance decay $t^{-\frac{d}{2}}$, up to a
logarithmic correction, for the semigroup of an infinite particle system on
$\mathbb{R}^d$, where every particle evolves following a divergence-form
operator with diffusivity coefficient that depends on the local configuration
of particles. The proof relies on the strategy from $\mathbb{Z}^d$ zero range
model, and generalizes the localization estimate to the continuum configuration
space introduced by S. Albeverio, Y.G. Kondratiev and M. R\"ockner.
