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π junction qubit in monolayer graphene

机译:单层石墨烯中的π结量子位

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摘要

We propose to combine the advantages of graphene, such as easy tunability and long coherence times, with Josephson physics to manufacture qubits. If these qubits are built around a 0 and π junction, they can be controlled by an external flux. Alternatively, a π-wave Josephson junction can itself be tuned via a gate voltage to create superpositions between macroscopically degenerate states. We show that ferromagnets are not required for realizing π junction in graphene, thus considerably simplifying its physical implementation. We demonstrate how one qubit gates, such as arbitrary phase rotations and the exchange gate, can be implemented.
机译:我们建议将石墨烯的优点(如易调谐性和长相干时间)与约瑟夫森物理学相结合来制造量子位。如果这些量子位围绕0和π结构建,则可以通过外部通量来控制它们。可替代地,π波约瑟夫逊结本身可以通过栅极电压进行调谐,以在宏观退化状态之间产生叠加。我们表明,在石墨烯中实现π结不需要铁磁体,从而大大简化了其物理实现。我们演示了如何实现一个量子比特的门,例如任意相位旋转和交换门。

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