On-demand population of Andreev levels by their ionization in the presence of Coulomb blockade
Pavel D. Kurilovich, Vladislav D. Kurilovich, Aleksandr E. Svetogorov, Wolfgang Belzig, Michel H. Devoret, Leonid I. Glazman
DOI 10.1103/PhysRevB.110.184508 · Physical Review B
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Abstract
A mechanism to deterministically prepare a nanowire Josephson junction in an odd parity state is proposed. The mechanism involves population of two Andreev levels by a resonant microwave drive breaking a Cooper pair, and a subsequent ionization of one of the levels by the same drive. Robust preparation of the odd state is allowed by a residual Coulomb repulsion in the junction. A similar resonant process can also be used to prepare the junction in the even state. Our theory explains a recent experiment [J. J. Wesdorp et al., Phys. Rev. Lett. 131, 117001 (2023)].
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