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• W1967554992 abstract "We propose an approach allowing the computation of currents and their correlations in interacting multiterminal mesoscopic systems involving quantum dots coupled to normal and/or superconducting leads. The formalism relies on the expression of branching currents and noise crossed correlations in terms of one- and two-particle Green's functions for the dots electrons, which are then evaluated self-consistently within a conserving approximation. We then apply this to the Cooper-pair beam-splitter setup recently proposed [L. Hofstetter et al., Nature (London) 461, 960 (2009); Phys. Rev. Lett. 107, 136801 (2011); L. G. Herrmann et al., Phys. Rev. Lett. 104, 026801 (2010)], which we model as a double quantum dot with weak interactions, connected to a superconducting lead and two normal ones. Our method not only enables us to take into account a local repulsive interaction on the dots, but also to study its competition with the direct tunneling between dots. Our results suggest that even a weak Coulomb repulsion tends to favor positive current cross correlations in the antisymmetric regime (where the dots have opposite energies with respect to the superconducting chemical potential)." @default.
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• W1967554992 date "2012-01-13" @default.
• W1967554992 modified "2023-10-18" @default.
• W1967554992 title "Current correlations in an interacting Cooper-pair beam splitter" @default.
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• W1967554992 doi "https://doi.org/10.1103/physrevb.85.035419" @default.
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