论文标题
量子点通过Andreev绑定状态在半导体 - 驱动器纳米线中通过Andreev绑定状态进行调节超导耦合
Tunable superconducting coupling of quantum dots via Andreev bound states in semiconductor-superconductor nanowires
论文作者
论文摘要
半导体量子点已被证明是在固态下量子模拟的有用平台。但是，迄今为止，由库珀对介导的量子点之间实现超导耦合，遭受了有限的可调性和强抑制作用。这具有有限的应用，例如库珀对分裂和拓扑基塔夫链的量子点模拟。在这项工作中，我们提出了如何在连接两个量子点连接的半导体 - 驱动器纳米线中通过Andreev结合状态介导可调有效的耦合。我们表明，通过这种方式，可以通过更改Andreev Bound状态的属性，使用易于访问的实验参数来单独控制由Cooper Pairs和单个电子介导的耦合。此外，耦合抑制的问题大大减轻了。我们还提出了如何在三端连接中从共振电流中提取耦合强度的方法。我们的建议将使未来到目前为止无法实现的实验。
Semiconductor quantum dots have proven to be a useful platform for quantum simulation in the solid state. However, implementing a superconducting coupling between quantum dots mediated by a Cooper pair has so far suffered from limited tunability and strong suppression. This has limited applications such as Cooper pair splitting and quantum dot simulation of topological Kitaev chains. In this work, we propose how to mediate tunable effective couplings via Andreev bound states in a semiconductor-superconductor nanowire connecting two quantum dots. We show that in this way it is possible to individually control both the coupling mediated by Cooper pairs and by single electrons by changing the properties of the Andreev bound states with easily accessible experimental parameters. In addition, the problem of coupling suppression is greatly mitigated. We also propose how to experimentally extract the coupling strengths from resonant current in a three-terminal junction. Our proposal will enable future experiments that have not been possible so far.
