Recent progress of superconducting electronics in China

Abstract

It has been nearly 110 years since the discovery of superconductors, and more than 30 years since the discovery of high temperature superconductors (HTS). Great progress has been made in the application of superconducting electronics in the last two decades. HTS microwave devices have shown much higher perfomance than the traditional ones and have found their ways to the industry applications in mobile communication, radar, and special communication applications. Owing to the ultrahigh sensitivity to magnetic fields and currents, superconducting quantum interference devices (SQUIDs) have been used as the irresplacible sensors in geological surveying, magnetic resonanc imaging, biomagnetic imaging, and other areas. The sensitivity of superconducting radiation detectors such as superconducting SIS mixer, superconducting hot electron bolometer, superconducting transition edge sensor, superconducting nanowire single photon detector, and superconducting microwave kinetic inductance detector are near the quantum limitation. They are now key technology in geophysics, astrophysics, quantum information science, biomedicine, and so on. Superconducting Josephson parametric amplifier has become a key element for superconducting quantum computing. Superconducting integrated circuit has been included in the international roadmap for devices and systems, and shows that having the potential to become one of the mainstreams for post-Moore information processing technology. In metrology, superconducting Josephson effect and Josephson junction array devices have been widely used in the redefinition of quantum voltage reference and basic units of the International system of Units. Superconducting electronics plays an important role in the current quantum information technology boom, which in turn promotes the development of superconducting electronics. This review will brief introduce the research and application of superconducting electronics in China in recent years.

Temporal and Spatial Pattern Evolution and Influencing Factors of the National Comprehensive Disaster-Reduction Demonstration Community in China

“…And then, we calculate the value of the F test statistic for the regression coefficient of the variable x i , denoted by F 1 (1) , . .…”

“…For a given significance level α, the corresponding critical value is denoted by F (1) . If F i 1 (1) ≥ F (1) , x i 1 is introduced into the regression model, eliminate x i 1 otherwise.…”

“…China is one of the countries with the most serious natural disasters in the world [1]. In recent years, the frequency and severity of extreme weather events such as droughts, wildfires, storms, floods, and heatwaves have increased under the continuous influence of global climate change and human activities, causing a large number of casualties and property losses [2,3].…”

Design of High-Order Resonator HTS Diplexer with Very Different FBW

“…The HTS thin film materials have meager surface resistance in the microwave frequency band. Therefore, the planar filter and diplexer made of HTS film can deal with filter insertion loss and filter order [8]. Moreover, the HTS diplexer with a high-order resonator coupling structure exhibits superior comprehensive performance than the traditional microwave filter in terms of microwave loss and frequency selection characteristics [9][10][11].…”

Noise processing of superconducting kinetic inductance single photon detector

“…尤其是, 目前几种主流的超导单光子探测器: 超 导纳米单光子探测器(superconducting nanowire single photon detector, SNSPD) [6] 、超导转边缘探 测器(transition edge sensor, TES) [7] 以及微波动 态 电 感 探 测 器 (microwave kinetic inductance detector, MKID) [8] 等都能以各种方式实现光子数 分辨, 从而可应用于实现光场量子态非高斯操作 [9] .…”