Science Daily January 11, 2021
An international team of researchers (Switzerland, the Netherland) has created the qubits in the form of “hole spins” that can be switched from a stable idle mode to a fast calculation mode. The spins can be selectively coupled — via a photon, for example — to other spins by tuning their resonant frequencies. They can be coherently flipped from up to down in as little as a nanosecond allowing up to a billion switches per second. For their experiments, the researchers used a semiconductor nanowire made of silicon and germanium wire that has a diameter of about 20 nanometers. As the qubit is extremely small, it should in principle be possible to incorporate millions or even billions of these qubits onto a chip…read more. TECHNICAL ARTICLE
Experimental set-up and EDSR. Credit: Nature Nanotechnology (2021)