  We investigate the properties of $qq$ and $q\bar q$ states in hot and dense
quark matter in the framework of light-front finite temperature field theory.
Presently we use the Nambu Jona-Lasinio model of QCD and derive the gap
equation at finite temperature and density. We study pionic and scalar diquark
dynamics in quark matter and calculate the masses and the Mott dissociation as
a function of the temperature $T$ and the chemical potential $\mu$. For the
scalar diquark we determine the critical temperature of color
superconductivity.
