Stability of normal quantum-fluid mixtures

Mixtures of quantum fluids, that is gases or liquids, are considered with the emphasis on conditions characterizing stability mixtures. The mixtures, can be formed by cold atoms molecules, assumed to requiring description using techniques, but not so exhibit superfluidity superconductivity. Reviewing such normal systems important for comparison these of, e.g., Bose-condensed behavior observable quantities under stratification mixtures discussed.