Phys.org March 15, 2019
An international team of researchers (Denmark, Australia, USA – Purdue University) discovered that by placing a large, elongated quantum dot between the left dots and right dots, it can mediate a coherent swap of spin states, within a billionth of a second, without ever moving electrons out of their dots. In other words, we now have both fast interaction and the necessary space for the pulsed gate electrodes. The research may have profound implications for the architecture of solid-state quantum computers allowing the realization of networks in which the increased qubit-qubit connectivity translated into a significantly increased computational quantum volume…read more. TECHNICAL ARTICLE
To manipulate individual electrons within the quantum-dot array, they applied fast voltage pulses to metallic gate electrodes located on the surface of the gallium-arsenide crystal. Credit: Niels Bohr Institute