(Biophotonics) Theoretical and experimental collaboration has led to the fabrication of the first quantum phase battery. The idea was first conceived in 2015, by Sebastian Bergeret from the Mesoscopic physics group at the Materials Physics Center (CFM, CSIC-UPV/EHU), and Ilya Tokatly, Ikerbasque Professor in the Nano-Biospectroscopy group of the UPV/EHU, both Donostia international Physics Center (DIPC) associate researchers. They proposed a theoretical system with the properties needed to build the phase battery. It consist of a combination of superconducting, and magnetic materials with an intrinsic relativistic effect, called spin-orbit coupling.
Now, Francesco Giazotto and Elia Strambini from the NEST-CNR Institute, Pisa, identified a suitable material combination and fabricated the first quantum phase battery which results are now published in the prestigious journal Nature Nanotechnology. It consists of an n-doped InAs nanowire forming the core of the battery (the pile) and Al superconducting leads as poles. The battery is charged by applying an external magnetic field, which then can be switched off.
The future of this battery is further being improved at CFM premises in a collaboration between the Nanophysics Lab and the Mesoscopic Physics Group. This work contributes to the enormous advances being made in quantum technology that are expected to revolutionize both computing and sensing techniques, as well as medicine, and telecommunications in the near future.

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