NIST scientists are developing a new electrical standard using quantum materials to simplify how voltage and resistance are calibrated. Currently, accurate measurements require separate instruments and extreme magnetic fields, forcing engineers to send devices to NIST for weeks of testing. This new approach aims to create both standards in a single, portable device, eliminating the need for bulky equipment and expensive shipping.
The project is currently in the development and fabrication planning stage, utilizing a quantum effect called the Quantum Anomalous Hall Effect to enable resistance measurements without powerful magnets. While current materials require extreme cold, new research suggests portable cooling systems could suffice. If successful, this system would allow companies and the military to perform calibrations in-house, saving time and money while potentially aiding the development of error-resistant quantum computers.
Source: https://www.nist.gov/noac/technology/current-and-voltage/all-one-electrical-standards
Keywords: quantum anomalous Hall effect, magnetic topological insulators, portable cryostat