  We present the derivation of the Casimir-Polder interactions mediated by a
massive photon between two neutral systems described in terms of their atomic
polarizability tensors. We find a compact expression for the leading term at
large distances between the two systems. Our result reduces, in the mass-less
photon limit, to the standard Casimir-Polder. We discuss implications of our
findings with respect to recent scenarios of physics beyond the standard model
such as universal extra dimensions, Randall-Sundrum and scale-invariant models.
For each model we compute the correction to the Casimir-Polder interaction in
terms of the free parameters.
