Single ions in nano-sized particles: A new platform for quantum information processing

https://phys.org/news/2023-11-ions-nano-sized-particles-platform-quantum.html

"device 2 orders magnitude smaller... nanoparticles each containing approx. 1000 Er ions placed on mirror and cooled to ~6°K... erbium ions excited with laser at 1,535 nm... increase in ion emission >100X... saturate ion with only ~10-2 photons in cavity per cavity lifetime emitting only 1 photon at a time... enable quantum processors using hundreds of qubits in nanoscale volume... erbium ions provide communication qubits connecting quantum processors... low-loss and fast interface between quantum internet nodes"