  Light clusters (mass number $A \leq 4$) in nuclear matter at subsaturation
densities are described using a quantum statistical approach. In addition to
self-energy and Pauli-blocking, effects of continuum correlations are taken
into account to calculate the quasiparticle properties and abundances of light
elements. Medium-modified quasiparticle properties are important ingredients to
derive a nuclear matter equation of state applicable in the entire region of
warm dense matter below saturation density. Moreover, the contribution of
continuum states to the equation of state is considered. The effect of
correlations within the nuclear medium on the quasiparticle energies is
estimated. The properties of light clusters and continuum correlations in dense
matter are of interest for nuclear structure calculations, heavy ion
collisions, and for astrophysical applications such as the formation of neutron
stars in core-collapse supernovae.
