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

Abstract

Photon-associated electron tunneling ͑PAT͒ 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.

Negative Differential Conductance Assisted by Optical Fields in a Single Quantum Dot with Ferromagnetic Electrodes

“…However, most of the studies employ a classical treatment for the external field, that introduces a time-dependent oscillating energy level in QD, which is valid only in the case of a high-intensity field and weak coupling [21]. It has been shown that the spectrum in the quantum case is shifted from the non-interacting spectrum, and that the shift of photon sidebands is photon-intensity-dependent [21,22]. Employing the quantum treatment of the electron–photon interaction [21] and the Keldysh non-equilibrium Green’s function approach [23,24,25,26], we study photon-assisted transport properties of electrons through a single QD connected with ferromagnetic electrode leads.…”

Electron-photon interaction associated with uncertainty-based tunneling in a parallel double quantum dot

“…The pattern of Rabi splitting also emerges from the PAT in the double quantum dot or two states quantum dot and reflects on the profile of the PAT current or conductance. [19][20][21][22] The uncertainty principle is one of the basic principle in quantum mechanics and affects the electronic transport. The Kondo effect is one of the quantum phenomena which is related to the uncertainty based electronic transport and has been experimentally observed in the QD system.…”