论文标题
通用时间 - 最佳非亚洲几何门的实验实现
Experimental Realization of Universal Time-optimal non-Abelian Geometric Gates
论文作者
论文摘要
基于量子阶段的几何性质，非绝热的全能量子控制（NHQC）已成为增强构建量子门的鲁棒性的标准技术。但是，NHQC的常规方法对控制不稳定性很敏感，因为它需要驱动脉冲覆盖固定的脉冲区域。此外，即使对于小角度旋转，所有操作都需要以相同的持续时间完成。在这里，我们在实验上证明了NHQC（称为TounHQC）的时间优化和非常规方法，该方法可以优化任何自动栅极的操作时间。与常规方法相比，TOUNHQC为脱碳和控制误差提供了额外的鲁棒性。该实验涉及超导电路的可扩展体系结构，我们使用交织的随机基准测试实现了单个Qubit门的忠诚度为99.51％。此外，与NHQC相比，已经实施了两个Qubit的全体控制相栅极，在该门误差可以减少多达18％的情况下。
Based on the geometrical nature of quantum phases, non-adiabatic holonomic quantum control (NHQC) has become a standard technique for enhancing robustness in constructing quantum gates. However, the conventional approach of NHQC is sensitive to control instability, as it requires the driving pulses to cover a fixed pulse area. Furthermore, even for small-angle rotations, all operations need to be completed with the same duration of time. Here we experimentally demonstrate a time-optimal and unconventional approach of NHQC (called TOUNHQC), which can optimize the operation time of any holonomic gate. Compared with the conventional approach, TOUNHQC provides an extra layer of robustness to decoherence and control errors. The experiment involves a scalable architecture of superconducting circuit, where we achieved a fidelity of 99.51% for a single qubit gate using interleaved randomized benchmarking. Moreover, a two-qubit holonomic control-phase gate has been implemented where the gate error can be reduced by as much as 18% compared with NHQC.
