Quantum chips might use photons obtained from spins of electrons.
Quantum chips convert electron spin into photons/light – technology news

Two independent groups of scientists have managed to convert the spin of the electron into photons (light signals). This technological breakthrough contributes to the development of quantum chips that could process information at an amazingly high speed. Quantum chips are likely to drive the quantum computers of the future, computers much powerful than the conventional ones. This process works at room temperature, which has important practical applications, and it results from combining spintronics and nanophotonics sciences, paving the way towards quantum computers.

Read the full story: Delft University of Technology
Scientific publication: Science