Electron Bunching in Stacks of Coupled Quantum Dots

Abstract

We study the transport properties of two double quantum dots in a parallel arrangement at temperatures of a few Kelvin. Thereby, we show that decoherence entailed by the substrate phonons affects the shot noise. For asymmetric coupling between the dots and the respective lead, the current noise is sub-Poissonian for resonant tunneling, but super-Poissonian in the vicinity of the resonances. Our results indicate that phonon emission and absorption is responsible for the shot noise enhancement. The observed asymmetry of the peaks at low temperatures stems from spontaneous emission.

4 pages, 5 figures. Published version

References in corpus (17)

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Cited by in corpus (17)

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• Tunable dynamical channel blockade in double-dot Aharonov-Bohm interferometers
• Thermoelectrics with Coulomb coupled quantum dots
• Resonance fluorescence in driven quantum dots: electron and photon correlations
• Spin correlations in spin blockade
• Enhanced shot noise in asymmetric interacting two level systems
• Unified single-photon and single-electron counting statistics: from cavity-QED to electron transport
• Quantum transport of double quantum dots coupled to an oscillator in arbitrary strong coupling regime
• Edge-state Blockade of Transport in Quantum Dot Arrays
• Full Counting statistics of level renormalization in electron transport through double quantum dots
• Electronic statistics-on-demand: bunching, anti-bunching, positive and negative correlations in a molecular spin-valve
• Coherent quantum ratchets driven by tunnel oscillations: Fluctuations and correlations
• Temperature-dependent broadening of coherent current peaks in InAs double quantum dots
• Spin-dependent current noises in transport through coupled quantum dots
• All-thermal reversal of heat currents using qutrits