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Updated: Nov 8, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Published on: August 2, 2019

Microwave response in a topological superconducting quantum interference device.

Wei Pan¹, Daniel Soh², Wenlong Yu³

¹Sandia National Labs, Livermore, CA, 94551, USA. wpan@sandia.gov.

Scientific Reports

|April 22, 2021

Summary

This summary is machine-generated.

Researchers studied microwave response in a topological superconducting quantum interference device (SQUID) made from Dirac semimetal Cd3As2. They found that effective temperature increases with microwave power, suggesting potential for single photon detection in topological quantum materials.

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Area of Science:

Quantum Information Science and Technology
Condensed Matter Physics
Materials Science

Background:

Photon detection at microwave frequencies is crucial for quantum computation and information science.
Topological quantum materials offer unique electronic properties with potential applications in advanced technologies.

Purpose of the Study:

To investigate the microwave response of a topological superconducting quantum interference device (SQUID).
To explore the feasibility of using Dirac semimetal Cd3As2 for microwave photon detection.

Main Methods:

Fabrication of a SQUID device using Dirac semimetal Cd3As2.
Studying the temperature and microwave power dependence of the SQUID junction resistance.
Determining the effective temperature at various microwave power levels.

Main Results:

The effective temperature of the SQUID was observed to increase with increasing microwave power.
A significant microwave response was detected in the topological SQUID device.
The study established a correlation between microwave power and effective temperature.

Conclusions:

The observed large microwave response in topological SQUID devices suggests their potential for single photon detection at microwave frequencies.
Dirac semimetal Cd3As2 is a promising material for developing novel microwave photon detectors.
This research opens new avenues for quantum technologies leveraging topological quantum materials.