论文标题
单渠道约瑟夫森连接中的负临界电流
Negative critical currents in single-channel Josephson junctions
论文作者
论文摘要
我们认为，在由单个通道导体形成的约瑟夫森连接中产生的负临界电流。具体而言，我们从理论上研究了两个由库仑封锁状态中的一维导体连接的超导导线之间的约瑟夫森耦合。我们表明，在清洁方案中，临界电流的符号与正常区域中的电子数交替。对于奇数占用率，即使导体上的电子数量很大，临界电流也为负。
We argue that negative critical currents arise generically in Josephson junctions formed by single channel conductors. Specifically, we theoretically study the Josephson coupling between two superconducting leads connected by a one-dimensional conductor in the Coulomb blockade regime. We show that in the clean regime the sign of the critical current alternates with the number of electrons in the normal region. For odd occupancy the critical current is negative even when the number of electrons on the conductor is large.
