论文标题
基于两个旋转小工具的两小时的纠缠门
A two-qubit entangling gate based on a two-spin gadget
论文作者
论文摘要
具有通量偏置控制的双Quibit Gate的速度和操作便利速度使其成为基于高相干通量量子的将来大规模量子计算机的重要候选者。基于一个正确设计的两旋旋转小工具，该小工具在能量水平的演变过程中具有较小的间隙，我们建造了一个cnot等效的门，该门可以达到40ns内的忠诚度大于99.9％。此外，我们还使用Schrieffer-Wolff变换来将旋转模型ising系数时间表转换为电路模型通量偏置计划，用于与可调的RF-squid相连的真实通量Qubit电路。此处介绍的两个Quibit纠缠栅极方案适合在大规模通量量子系统中实现有效的两分门，以电感耦合为主。与以电容耦合为主的当前基于门的量子计算系统相比，它可以解决速度和高相干性之间的冲突。
The faster speed and operational convenience of two-qubit gate with flux bias control makes it an important candidate for future large-scale quantum computers based on high coherence flux qubits. Based on a properly designed two-spin gadget which has small gaps during the evolution of energy levels, we build a CNOT-equivalent gate which can reach a fidelity larger than 99.9% within 40ns. Moreover, we also use the Schrieffer-Wolff Transformation to translate the spin model Ising coefficients schedule to circuit model flux bias schedule for realistic flux qubit circuits coupled by a tunable rf-squid. The two-qubit entangling gate scheme introduced here is suitable for realizing efficient two-qubit gates in the large scale flux qubit systems dominated by inductive couplings. Comparing with the current gate-based quantum computation systems dominated by capacitive couplings, it can resolve the conflict between the speed and a high coherence.
