Researchers from the Basque Country and Italy used indium arsenide cores and aluminum superconductors as poles to create a battery that may be the key to certain quantum technologies. The super current it generates is not induced by voltage like a traditional battery, but is caused by the phase difference in the quantum circuit.
The classic piling is a part of our daily life and is well known. It converts chemical energy into voltage, which can then power electronic circuits in a variety of devices.
However, in many cases Quantum technology, Circuits or devices are based on superconducting materials, in which current can flow without applying voltage. Therefore, in this type of system, you do not need a traditional battery.
These currents are called Overcurrent Because they do not cause energy loss.They are not induced by voltage, but by Phase difference of wave function The nature of quantum circuits is directly related to the wave nature of matter.
In this way, a quantum device that can provide a permanent phase difference can be regarded as a Quantum phase stack, It will induce super currents in quantum circuits.
Now, a group of scientists from the Basque Country and Italy have published an article in the journal Nature Nanotechnology The result of theoretical and experimental cooperation led to the manufacture of the first battery of this type. According to the authors, it constitutes a key element of quantum technology based on coherence.
This idea was first proposed in 2015, Sebastian Bergeret Member of the Mesoscopic Physics Group of the Center for Materials Physics (CFM, CSIC and UPV/EHU Hybrid Center of the University of the Basque Country) Ilya Tokatly, Professor Ikerbasque of the Nanospectroscopy Group UPV / EHU, All belong to the Donostia International Physics Center (Dip).
Together, they proposed a theoretical system that has the characteristics needed to build a phase stack that combines superconducting and magnetic materials with inherent relativistic effects, called spin-orbit coupling.
A few years later, the researchers Francesco Giazotto And Elia Strambini of the Institute NEST-CNR The Pizza Company cooperated with others at the University of Salerno in Italy to determine the appropriate material combination and produced the first quantum phase battery.
It consists of a Indium arsenide nanowires Form the core of the battery, Aluminum superconducting cable Act as two poles. Charge the battery by applying an external magnetic field, which can then be turned off.
Scientists Cristina Sanz-Fernández and Claudio Guarcello, also from CFM, modified the theory to simulate experimental results.
To this day, researchers in CFM’s Nanophysics Laboratory and Mesoscopic Physics Group continue to work to determine the future improvements of this battery.
This work has contributed to the great progress in the world. Quantum technology It is expected to revolutionize computing and sensing technology, as well as medical and telecommunications fields in the near future.
Elia Strambini, Andrea Iorio, Ofelia Durante, Roberta Citro , Cristina Sanz-Fernández (Cristina Sanz-Fernández), Claudio Guarcello (Claudio Guarcello), Ilya Tocatelli (Ilya V. “Josephson Phase Battery”. Nature Nanotechnology, 2020. DOI: 10.1038 / s41565-020-0712-7