Quantum mechanical approach for photon-associated electron tunneling through a quantum dot

Photon-associated electron tunneling (PAT) in a quantum dot is studied by a fully quantum-mechanical approach. An experiment to determine the electron-photon coupling coefficient g and the photon number of the system is proposed to distinguish whether the system is in the quantum situation or the semiclassical situation. It is also found that the PAT current is assisted or suppressed depending on the shift of the environment photon-intensity-dependent photon sidebands.