Coupling Electron Spins in Quantum Rings to Microwave Photons

Parallel double quantum dots in nonawires can be configured to host electrons in ring states which posses an angular momentum. By detuning the double dot levels using a gate voltage, the ring states can be destroyed and the electrons are localized in the separated dots with nearly no angular momentum. This changes their g-factor which can be used to drive Rabi oscillations of the electron spins by coupling a cavity to the gate.