Calcium oxide's quantum secret: Nearly noiseless qubits

https://phys.org/news/2024-06-calcium-oxide-quantum-secret-noiseless.html

"tiny, lone atoms of bismuth embedded within solid cheap calcium oxide can act as qubits... low noise level, holds information for long time... bismuth defect within calcium oxide can theoretically encode data with little noise and for relatively long periods of time (multiple seconds compared to the milliseconds of coherence shown by many qubits)... favorable refractive index, ability to emit photons of light"