Finite-frequency current (shot) noise in coherent resonant tunneling through a coupled-quantum-dot interferometer

Abstract

We examine the shot noise spectrum properties of coherent resonant tunneling in coupled quantum dots in both series and parallel arrangements by means of quantum rate equations and MacDonald's formula. Our results show that, for a series-CQD with a relatively high dot-dot hopping $\Omega$, $\Omega /\Gamma \gtrsim 1$ ($\Gamma$ denotes the dot-lead tunnel-coupling strength), the noise spectrum exhibits a dip at the Rabi frequency, $2\Omega$, in the case of noninteracting electrons, but the dip is supplanted by a peak in the case of strong Coulomb repulsion; furthermore, it becomes a dip again for a completely symmetric parallel-CQD by tuning enclosed magnetic-flux.

arXiv comment8 pages, 5 figures

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Cited by in corpus (10)

• Transport Statistics of Interacting Double Dot Systems: Coherent and Non-Markovian Effects
• Tunable dynamical channel blockade in double-dot Aharonov-Bohm interferometers
• Noise Spectra of ac-driven quantum dots
• Emission Noise in an Interacting Quantum Dot: Role of Inelastic Scattering and Asymmetric Coupling to the Reservoirs
• Magnetic field switching in parallel quantum dots
• Quantum noise in ac-driven resonant-tunneling double barrier structures: Photon-assisted tunneling vs. electron anti-bunching
• Noise spectra of an interacting quantum dot
• Nonequilibirum noise spectrum and Coulomb-blockade-assisted Rabi interference in a double-dot Aharonov-Bohm interferometer
• Distinguishing Majorana bound states from Andreev bound states through differential conductance and current noise spectrum
• Non-symmetrized quantum noise in a Kondo quantum dot