  Nuclear systems are treated within a quantum statistical approach.
Correlations and cluster formation are relevant for the properties of warm
dense matter, but the description is challenging and different approximations
are discussed. The equation of state, the composition, Bose condensation of
bound fermions, the disappearance of bound states at increasing density because
of Pauli blocking are of relevance for different applications in astrophysics,
heavy ion collisions, and nuclear structure.
