Quantum Photovoltaic Effect in Double Quantum Dots

Abstract

We analyze the photovoltaic current through a double quantum dot system coupled to a high-quality driven microwave resonator. The conversion of photons in the resonator to electronic excitations produces a current flow even at zero bias across the leads of the double quantum dot system. We demonstrate that due to the quantum nature of the electromagnetic field in the resonator, the photovoltaic current exhibits a double peak dependence on the frequency $\omega$ of an external microwave source. The distance between the peaks is determined by the strength of interaction between photons in the resonator and electrons in the double quantum dot. The double peak structure disappears as strengths of relaxation processes increases, recovering a simple classical condition for maximal current when the microwave frequency is equal to the resonator frequency.

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Cited by in corpus (8)

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• Cavity-coupled double-quantum dot at finite bias: analogy with lasers and beyond
• Full counting statistics of the photocurrent through a double quantum dot embedded in a driven microwave resonator
• Delocalization of electrons by cavity photons in transport through a quantum dot molecule
• Lasing in circuit quantum electrodynamics with strong noise
• Charge-photon transport statistics and short-time correlations in a single quantum dot-resonator system with arbitrarily large coupling parameter
• Steady state current fluctuations and dynamical control in a nonequilibrium single-site Bose-Hubbard system
• Electron-photon coupling in Mesoscopic Quantum Electrodynamics