Microwave response in a topological superconducting quantum interference device

TL;DR

This paper investigates the microwave response of a topological superconducting SQUID made from Dirac semimetal Cd3As2, revealing how microwave power affects its effective temperature and suggesting potential for microwave photon detection in quantum technologies.

Contribution

It provides the first detailed study of microwave response in a topological superconducting SQUID, highlighting power-dependent effective temperature behavior.

Findings

Effective temperature increases with microwave power.

Microwave response observed in topological superconducting SQUID.

Potential for single microwave photon detection in topological materials.

Abstract

Photon detection at microwave frequency is of great interest due to its application in quantum computation information science and technology. Herein are results from studying microwave response in a topological superconducting quantum interference device (SQUID) realized in Dirac semimetal Cd3As2. The temperature dependence and microwave power dependence of the SQUID junction resistance are studied, from which we obtain an effective temperature at each microwave power level. It is observed the effective temperature increases with the microwave power. This observation of microwave response may pave the way for single photon detection at the microwave frequency in topological quantum materials.