Description:

Abstract: Josephson parametric amplifiers have played an critical role in making superconducting quantum computing seem remotely viable. However, for many physicists involved in this work, these amplifiers can seem like a pragmatic (but necessary) afterthought. In this talk, I'll motivate why it's necessary to continue to develop these devices, explain the basics of parametric coupling, and how we've applied multimode linear coupled mode theory to create a new generation of parametric amplifiers. These amplifiers demonstrate complex important properties, including directionality (nonreciprocity), phase-sensitive gain, and nearly quantum-limited noise performance.

Speaker: Dr. Joe Aumentado, Advanced Microwave Photonics Group, NIST Boulder

Host: Venkat Chandrasekhar