论文标题
远程双量子点旋转量子台的谐振单发出CNOT
Resonant single-shot CNOT in remote double quantum dot spin qubits
论文作者
论文摘要
实现可伸缩量子处理器的关键要素是节点之间的非本地耦合。扩展连接性超出最近的邻居相互作用，需要实现中介相互作用通常称为“量子总线”。长期以来，超导量子群社区长期以来一直用作总线，但直到最近才证明，双量子点架构中的基于自旋的Qubit可以达到强耦合方案，并通过真实或虚拟光子的交换来展示自旋旋转相互作用。在腔体损失作用不太突出的色散状态下预测了两量闸门的操作。在这项工作中，我们在CNOT操作的背景下为AC驱动的量子门提出了一个框架，在两个非本地单旋转量子轴之间分散耦合到超导谐振器的共同模式。我们预计，现有技术的门时间接近150 ns，忠诚度超过90％。
A critical element towards the realization of scalable quantum processors is non-local coupling between nodes. Scaling connectivity beyond nearest-neighbor interactions requires the implementation of a mediating interaction often termed a 'quantum bus'. Cavity photons have long been used as a bus by the superconducting qubit community, but it has only recently been demonstrated that spin-based qubits in double quantum dot architectures can reach the strong coupling regime and exhibit spin-spin interactions via the exchange of real or virtual photons. Two-qubit gate operations are predicted in the dispersive regime where cavity loss plays a less prominent role. In this work we propose a framework for ac-driven quantum gates, in the context of a CNOT operation, between two non-local single-spin qubits dispersively coupled to a common mode of a superconducting resonator. We expect gate times near 150 ns and fidelities above 90% with existing technology.
