Energy-density-functional calculations including proton-neutron mixing

We present results of calculations based on the Skyrme energy density functional that include arbitrary mixing between protons and neutrons. In this framework, single-particle states are superpositions of proton and neutron components and the energy density functional is fully invariant with respect to three-dimensional rotations in the isospin space. The isospin of the system is controlled by means of the isocranking method, which carries the standard cranking approach over to isospin space. We show numerical results of the isocranking calculations performed for isobaric analog states in the A = 14 and A = 40-56 nuclei. We also present results obtained for high-isospin states in Cr-48, with constraints on the isospin implemented using the augmented Lagrange method.