Two-component spin mixtures

International speakers addressed different types of quantum mixtures, from multicomponent spin mixtures to mixtures of different atomic species, providing theoretical or experimental approaches for studying such powerful and promising platforms, characterized by ultimate control and able to show unprecedented features related to the interplay between two or more superfluid systems. The lectures provided a broad overview on the physics of atomic mixtures from the few-body regime, with the study of Feshbach resonances and the impurity problem, to the many-body regime, with the observation of new types of solitons and vortices and the realization of superfluid ferromagnetic systems. Several bosonic and fermionic mixtures showing complementary features were studied in different configurations, in harmonic, flat or lattice potentials, or in the presence of coherent coupling. Different kinds of interactions were explored, from short-range forces treatable within mean-field and beyond-mean-field schemes in spin mixtures, to long-range in dipolar gases and in hybrid systems made of charged ions immersed in a neutral gas.