Phys.org  February 16, 2022 Researchers at Caltech have developed an approach for quantum storage that relies on nuclear spins oscillating collectively as a spin wave. This collective oscillation effectively chains up several atoms to store information. They utilized a qubit made from an ion of ytterbium and embedded the ion in a transparent crystal of yttrium orthovanadate (YVO4) and manipulated its quantum states via a combination of optical and microwave fields. The Yb qubit was used to control the nuclear spin states of multiple surrounding vanadium atoms in the crystal. A unique feature of this system is the pre-determined placement […]