Switzerland uses nanodiamond to achieve new breakthroughs in quantum technology

Recently, physicists at the University of Basel in Switzerland have used nanodiamonds to achieve new breakthroughs in quantum information technology. Under certain conditions, they have discovered currents that can identify carbon lattice defects in diamonds. The research results were published in the Journal of Nanotechnology. The research team at the University of Basel and the St. Louis-French Institute used a scanning tunneling microscope and an atomic force microscope to observe the 5 nanometer-sized diamond crystals, and studied the atomic structure of the crystal surface, the hexagonal carbon surface and graphite reconstruction. Through these studies, the staff found that when a diamond is illuminated with a green beam at a certain voltage, additional current is present.

According to the staff, this extra current has a certain correlation with the defects of the diamond carbon lattice, which is also the optically active nitrogen vacancy center (NV center). These NV centers have unlimited application prospects in some future quantum information processing systems, and can be used in the fields of spin magnetic sensors and single photon sources. Because traditional test methods are difficult to operate on nanoscale diamonds, scientists have experimented with a number of different new methods and have finally succeeded.

Ernst Meyer, professor of physics at the University of Basel, commented that this new discovery has led to a clearer determination of the existence of optically active nanodiamond nitrogen vacancy centers; in the future, quantum computers using nitrogen vacancy centers are bound to work better than traditional computers. higher efficiency. (Compiled from "Electrified diamonds: Physicists on the trail of quantum information")

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