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A double quantum dot device, connected to two channels that only see eachother through interdot Coulomb repulsion, is analyzed using the numericalrenormalization group technique. By using a two-impurity Anderson model, andparameter values obtained from experiment [S. Amasha {\it et al.}, Phys. Rev.Lett. {\bf 110}, 046604 (2013)], it is shown that, by applying a moderatemagnetic field, and adjusting the gate potential of each quantum dot, opposingspin polarizations are created in each channel. Furthermore, through a welldefined change in the gate potentials, the polarizations can be reversed. Thispolarization effect is clearly associated to a spin-orbital Kondo state havinga Kondo peak that originates from spatially separated parts of the device. Thisfact opens the exciting possibility of experimentally probing the internalstructure of an SU(2) Kondo state.

Polarized currents and spatial separation of Kondo state: NRG study of spin-orbital effect in a double QD