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We consider a Josephson bijunction consisting of three superconducting reservoirs connected through two quantum dots. In equilibrium, the interdot coupling is sizable only for distances smaller than the superconducting coherence length. Application of commensurate dc voltages results in a time-periodic Hamiltonian and induces an interdot coupling at large distances.
We introduce a model to study magnon scattering in skyrmion crystals, sandwiched between ferromagnets, which act as the source of magnons. Thanks to recent experimental advances, such a set-up can be realised in quantum Hall heterojunctions, and it is interesting as skyrmions are topological objects while the skyrmion crystals break internal and translational symmetries, thus allowing to study the interplay of topological and symmetry breaking physics.
Abstract We study the voltage-biased S-QD-S-QD-S Josephson junction, composed of three superconductors (S) and two quantum dots (QDs). In the absence of an applied voltage, the Andreev bound states on each quantum dot hybridize, forming an “Andreev molecule.” However, understanding of this system in a nonequilibrium setup is lacking.
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