Optical conductivity of a superfluid density wave

We present a calculation of the low-frequency optical conductivity of a superconductor in the presence of quenched inhomogeneity in both the superfluid and normal fluid densities. We find that inhomogeneity in the superfluid density displaces spectral weight from the condensate to a frequency range that depends critically on the spatial correlation of normal and superfluid density fluctuations. (C) 2003 Elsevier Science B.V. All rights reserved.