The Andreev spectrum of a quantum dot embedded in a hybrid semiconductor-superconductor interferometer can be modulated by electrostatic gating, magnetic flux through the interferometer, and Zeeman splitting from an in-plane magnetic field. We demonstrate parity transitions in the embedded quantum dot system and show that the Zeeman-driven transition is accompanied by a 0-$\pi$ transition in the superconducting phase across the dot. We further demonstrate that flux through the interferometer modulates both dot parity and 0-$\pi$ transitions.

中文翻译：

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安德列夫量子点中塞曼驱动的奇偶跃迁

嵌入在混合半导体-超导体干涉仪中的量子点的安德列夫光谱可以通过静电选通、通过干涉仪的磁通量和从面内磁场中分裂出来的塞曼进行调制。我们展示了嵌入式量子点系统中的奇偶跃迁，并表明塞曼驱动的跃迁伴随着 0-$\pi$点上的超导相转变。我们进一步证明通过干涉仪的通量调制点奇偶校验和 0-$\pi$ 过渡。