Motivated by recent experiments with proximitized nanowires, we study a mesoscopic $s$-wave superconductor connected via point contacts to normal-state leads. We demonstrate that at energies below the charging energy the system is described by the two-channel Kondo model, which can be brought to the quantum critical regime by varying the gate potential and conductances of the contacts.

中文翻译：

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共振安德列夫传导中的量子临界性

受最近使用纳米线的实验的启发，我们研究了介观 $s$波超导体通过点触头连接到正常状态的导线。我们证明，在低于充电能量的能量下，该系统由两通道近藤模型描述，该模型可以通过更改栅极电势和触点电导来引入量子临界状态。