论文标题
一个基于高阻力超导纳米线的紧凑型和可调的前进耦合器
A compact and tunable forward coupler based on high-impedance superconducting nanowires
论文作者
论文摘要
发展紧凑，低衰减，低温兼容的微波电子设备对于扩大低温量子计算系统至关重要。在本文中，我们演示了一个基于高阻力慢波超导纳米线传输线的超紧凑的微波定向向前耦合器。制造设备的耦合部分的占地面积为$ 416 \，\ mathrm {μm^2} $。在4.753 GHz时，输入信号夫妇均与$ -6.7 \，\ Mathrm {db} $，带有$ -13.5 \，\ Mathrm {db} $ nibalation $ -6.7 \，\ mathrm {db} $均等到前耦合端口（50:50）。可以通过利用动力学对这些量的依赖性来控制耦合比通过DC偏置电流或温度来控制。材料和制造过程适合与超导电路直接集成，为开发大型量子计算机的信号分布瓶颈提供了实用的解决方案。
Developing compact, low-dissipation, cryogenic-compatible microwave electronics is essential for scaling up low-temperature quantum computing systems. In this paper, we demonstrate an ultra-compact microwave directional forward coupler based on high-impedance slow-wave superconducting-nanowire transmission lines. The coupling section of the fabricated device has a footprint of $416\,\mathrm{μm^2}$. At 4.753 GHz, the input signal couples equally to the through port and forward-coupling port (50:50) at $-6.7\,\mathrm{dB}$ with $-13.5\,\mathrm{dB}$ isolation. The coupling ratio can be controlled with DC bias current or temperature by exploiting the dependence of the kinetic inductance on these quantities. The material and fabrication-process are suitable for direct integration with superconducting circuits, providing a practical solution to the signal distribution bottlenecks in developing large-scale quantum computers.
