Composite superconductor materials for high quality resonators

高质量的超导体是超导量子计算技术的关键。因为. 由于其极低的损耗，被广泛用作存储和传输量子的核心部件 信息连贯一致。虽然已经尝试了许多超导体，但现有的知识已经停止了 到目前为止，仅限于探索单一材料。我们建议使用复合异质外延材料来 建造具有更高品质因数的超导体谐振器。该材料系统具有夹层结构： 中心层具有较高的临界场和临界温度，但它们的性能往往较差 微波传输；顶层和底面层由经过演示的材料形成 高Q微波性能，但它们往往具有较差的场性能。结合在一起，微波炉 由于集肤效应，信号在表面流动，而由于邻近效应，表面层被增强。这个 因此，复合系统的表现可以超过单独的每个组件。已开发的技术 将进一步加强加拿大在量子计算行业的领先地位。

High-quality superconductors are critical to the superconducting quantum computing technologies. Because of their extremely low loss, they are widely used as the core components to store and transfer quantum information coherently. While many superconductors have been attempted, the existing knowledge is quit limited to exploring single materials up to now. We propose to use composite heteroepitaxial materials to construct superconductor resonators with higher-quality factors. The material system has a sandwich structure: the center layer having higher critical field and critical temperature, but they tend to have poor performance for microwave transmission; the top and bottom surface layers are formed with materials with demonstrated high-Q microwave performance, but they tend to have poor field performances. Combined together, microwave signals flow on the surfaces due to skin effect, and the surface layers are enhanced due to proximity effect. The composite system thus can outperform each of the individual components alone. The developed technology will further strengthen Canada's leading role in the quantum computing industries.