论文标题
使用环谐振器，超导量子处理器中的远程连通性
Long-range connectivity in a superconducting quantum processor using a ring resonator
论文作者
论文摘要
量子相干性和栅极保真度通常被认为是表征量子处理器的两个最重要的指标。同样重要的度量是量距的连接性，因为它可以最大程度地减少门计数并允许有效地实现算法，并减少误差。但是，由于物理实现的实际限制，超导处理器中的问题间连通性往往仅限于最近的邻居。在这里，我们介绍了一种新型的超导体系结构，该体系结构使用环谐振器作为多路耦合元件，其量子位均匀地分布在其周长中。我们的平面设计在最先进的处理器的状态下，连通性可显着提高，而无需任何其他制造复杂性。我们理论上分析了量子的连接性，并在能够支撑多达十二个量子位的设备中对其进行实验验证，其中每个量子位可以连接到其他九个量子位。我们的概念是可扩展的，可适应其他平台，并有可能在量子计算，退火，模拟和误差校正方面显着加速进展。
Qubit coherence and gate fidelity are typically considered the two most important metrics for characterizing a quantum processor. An equally important metric is inter-qubit connectivity as it minimizes gate count and allows implementing algorithms efficiently with reduced error. However, inter-qubit connectivity in superconducting processors tends to be limited to nearest neighbour due to practical constraints in the physical realization. Here, we introduce a novel superconducting architecture that uses a ring resonator as a multi-path coupling element with the qubits uniformly distributed throughout its circumference. Our planar design provides significant enhancement in connectivity over state of the art superconducting processors without any additional fabrication complexity. We theoretically analyse the qubit connectivity and experimentally verify it in a device capable of supporting up to twelve qubits where each qubit can be connected to nine other qubits. Our concept is scalable, adaptable to other platforms and has the potential to significantly accelerate progress in quantum computing, annealing, simulations and error correction.
