  We have investigated the collective modes of unconventional charge and spin
density waves (UCDW, USDW) in quasi-one dimensional systems in random phase
approximation. The density correlator regains its normal state form due to the
phase degree of freedom of the condensate. The possible effect of impurities is
also discussed. From this, the current-current correlation function is
evaluated through charge conservation. The spin susceptibility of USDW remains
anisotropic an spite of the lack of any periodic modulation of the spin
density. In UCDW, the spin response gets weaker in all three directions as the
temperature is lowered.
