Electronic DC-SQUID Emulator for Teaching Josephson Junction Technologies

The recent progress in quantum computing technology has led to a large demand in scientists, engineers, and computer programmers trained in quantum information science and engineering¹. This has led to a need for the development of educational tools for training in quantum technologies. The most mature quantum technologies rely heavily on Josephson Junction circuits therefore an understanding of Josephson Junctions is crucial. We present a novel, low-cost design using readily available components for a circuit which emulates the properties of a DC-SQUID used for sensitive flux readout². Sensitive flux readout is critical for electron spin based and superconducting quantum technologies while a DC-SQUID is a classic introductory circuit example utilizing Josephson Junctions. Originally designed as a research tool to develop a novel flux feedback readout³, this low cost and compact circuit makes a student friendly device for learning quantum technologies.

1 Aiello et al., Quantum Sci. Technol. 6 030501 (2021)

2 Cochran et al., Submitted (2021)

3 Cochran et al., IEEE TASC vol.31 6 (2021)