论文标题
基于全壳纳米线的transmon中的Andreev模式
Andreev Modes from Phase Winding in a Full-shell Nanowire-based Transmon
论文作者
论文摘要
我们研究了由半导体纳米线制成的，具有完全周围的超导壳。在与破坏性的小公园效应相关的恢复超导性的状态下，在第一个恢复叶片中观察到许多连贯的转变，在第一个弹性叶中，壳的超导阶段的2π绕组均具有2π绕组，并且在零叶中不存在。随着栅极电压增加的连接密度，量子连贯性被抑制，然后在第一个叶中损失。这些观察结果和数值模拟突出了绕组诱导的Andreev状态在结中的作用。
We investigate transmon qubits made from semiconductor nanowires with a fully surrounding superconducting shell. In the regime of reentrant superconductivity associated with the destructive Little-Parks effect, numerous coherent transitions are observed in the first reentrant lobe, where the shell carries 2π winding of superconducting phase, and are absent in the zeroth lobe. As junction density was increased by gate voltage, qubit coherence was suppressed then lost in the first lobe. These observations and numerical simulations highlight the role of winding-induced Andreev states in the junction.
