论文标题
在混合量子点系统中可控的单库珀对分裂
Controllable Single Cooper Pair Splitting in Hybrid Quantum Dot Systems
论文作者
论文摘要
库珀对拆分器将实用程序作为调查库珀对纠缠的平台，但是用电压偏置的欧姆触点探测拆分器可防止电子对拆分对的保留，因为它们可以逃到排水库中。我们报告能够在从铅储层中分离出的多量词点设备中可控拆分和保留单个库珀对的能力，并分别演示了一种用于检测从分配对中出现的电子的技术。首先，我们使用GHz频率下的分散门传感确定了连贯的库珀对分裂电荷转变。其次，我们利用双量子点作为电子奇偶校验传感器来检测来自超导岛出现的电子导致的奇偶校验变化。
Cooper pair splitters hold utility as a platform for investigating the entanglement of electrons in Cooper pairs, but probing splitters with voltage-biased Ohmic contacts prevents the retention of electrons from split pairs since they can escape to the drain reservoirs. We report the ability to controllably split and retain single Cooper pairs in a multi-quantum-dot device isolated from lead reservoirs, and separately demonstrate a technique for detecting the electrons emerging from a split pair. First, we identify a coherent Cooper pair splitting charge transition using dispersive gate sensing at GHz frequencies. Second, we utilize a double quantum dot as an electron parity sensor to detect parity changes resulting from electrons emerging from a superconducting island.
