Functional renormalization group approach to the singlet-triplet transition in quantum dots
E. B. Magnusson,
N. Hasselmann,
I. A. Shelykh
Abstract:We present a functional renormalization group approach to the zero bias transport properties of a quantum dot with two different orbitals and in presence of Hund's coupling. Tuning the energy separation of the orbital states, the quantum dot can be driven through a singlet-triplet transition. Our approach, based on the approach by Karrasch et al.[15] which we apply to spin-dependent interactions, recovers the key characteristics of the quantum dot transport properties with very little numerical effort. We pres… Show more
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