论文标题
具有超导导线的量子点中自旋分裂水平的自旋分裂水平的光谱
Spectroscopy of spin-split Andreev levels in a quantum dot with superconducting leads
论文作者
论文摘要
我们使用杂交超导体 - 触发器透射器装置来执行量子点的光谱约瑟夫森连接点，该连接处调谐为具有未配对的准粒子的自旋1/2基态。由于自旋 - 轨道耦合，我们根据准粒子的自旋来解决transmon光谱中的两个通量敏感分支。有限的磁场在能量上移动了两个分支，有利于一种自旋状态，并导致约瑟夫森的异常效应。我们证明了使用全电控制对照的直接自旋转变的激发。操纵和控制自旋翼过渡可以使未来的充电能量保护的Andreev旋转量值实施。
We use a hybrid superconductor-semiconductor transmon device to perform spectroscopy of a quantum dot Josephson junction tuned to be in a spin-1/2 ground state with an unpaired quasiparticle. Due to spin-orbit coupling, we resolve two flux-sensitive branches in the transmon spectrum, depending on the spin of the quasi-particle. A finite magnetic field shifts the two branches in energy, favoring one spin state and resulting in the anomalous Josephson effect. We demonstrate the excitation of the direct spin-flip transition using all-electrical control. Manipulation and control of the spin-flip transition enable the future implementation of charging energy protected Andreev spin qubits.
