  We show that the presence of a driven bond in an otherwise diffusive lattice
gas with simple exclusion interaction results in long-range density-density
correlation in its stationary state. In dimensions $d>1$ we show that in the
thermodynamic limit this correlation decays as $C(r,s)\sim (r^2+s^2)^{-d}$ at
large distances $r$ and $s$ away from the drive with $|r-s|>>1$. This is
derived using an electrostatic analogy whereby $C(r,s)$ is expressed as the
potential due to a configuration of electrostatic charges distributed in
$2d$-dimension. At bulk density $\rho=1/2$ we show that the potential is that
of a localized quadrupolar charge. At other densities the same is correct in
leading order in the strength of the drive and is argued numerically to be
valid at higher orders.
