Physicists create first quantum phase battery

Good news!

"... The battery works using the so-called anomalous Josephson effect. ..."

"... a phase battery is a quantum device that provides a persistent phase bias to the wave function of a quantum circuit. It represents a key element for quantum technologies based on phase coherence. Here we demonstrate a phase battery in a hybrid superconducting circuit. It consists of an n-doped InAs nanowire with unpaired-spin surface states, that is proximitized by Al superconducting leads. ..."

Physicists create quantum phase battery – Physics World Researchers in Spain and Italy have constructed the first-ever quantum phase battery – a device that maintains a phase difference between two points in a superconducting circuit. The battery, which consists of an indium arsenide (InAs) nanowire in contact with aluminium (Al) superconducting leads, could be used in quantum computing circuits. It might also find applications in magnetometry and highly sensitive detectors based on superconductors.

Here is the link to the underlying research paper:

A Josephson phase battery (behind paywall; however if you click on link provided in the Physics World article, it will open up the PDF file)