Pavel D. Kurilovich, Vladislav D. Kurilovich, Aleksandr E. Svetogorov, Wolfgang Belzig, Michel H. Devoret, Leonid I. Glazman
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引用次数: 0
摘要
本文提出了一种以确定方式制备奇奇偶态纳米线约瑟夫森结的机制。该机制包括通过打破库珀对的共振微波驱动产生两个安德烈耶夫电平，以及随后通过相同的驱动使其中一个电平电离。结内残余的库仑斥力允许奇数态的稳健制备。类似的共振过程也可以用来制备偶态的结。我们的理论解释了最近的一项实验[J. J. Wesdorp 等人，Phys. Rev. Lett. 131, 117001 (2023)]。
On-demand population of Andreev levels by their ionization in the presence of Coulomb blockade
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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