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)].

中文翻译：

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在 Coulomb 阻断存在下通过电离的 Andreev 水平的按需种群


提出了一种确定性地准备奇奇偶态纳米线约瑟夫森结的机制。该机制涉及通过谐振微波驱动器打破库珀对来填充两个安德烈耶夫能级，然后由同一驱动器对其中一个能级进行电离。结中的残余库仑排斥允许对奇数态进行稳健准备。类似的谐振过程也可用于准备处于偶数状态的结。我们的理论解释了最近的一个实验 [J. J. Wesdorp et al.， Phys. Rev. Lett.131， 117001 （2023）]。