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- W1858921301 abstract "Using Nambu$otimes $spin space Keldysh Green's function approach, we present a nonequilibrium charge and spin pumping theory of a quantum dot in the mico-cavity coupled to two superconducting leads. It is found that the charge currents include two parts: The dissipationless supercurrent standing for the transfer of coherent Cooper pairs and the pumped quasi-particle current. The supercurrent exhibits a dynamic $0-pi $ transition induced by the frequency and strength of the $sigma_{-}$ polarized laser field. This dynamic transition is not affected by the strong Coulomb interaction. Especially, the spin current appears and is an even function of the phase difference between two superconductors when the frequency of the polarized laser field is larger than two times superconducting energy gap. Our theory serves as an extension to non-superconducting spintronics." @default.
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- W1858921301 date "2006-11-06" @default.
- W1858921301 modified "2023-10-16" @default.
- W1858921301 title "Dynamic $0-pi$ transition induced by pumping mechanism" @default.
- W1858921301 doi "https://doi.org/10.48550/arxiv.cond-mat/0611134" @default.
- W1858921301 hasPublicationYear "2006" @default.
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