Noise Enhancement due to Quantum Coherence in Coupled Quantum Dots

2007/06/20 by G. Kiesslich, G. Kießlich, Eckehard Schöll +5
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.99.206602

published as Phys. Rev. Lett. 99, 206602 (2007) · 4 pages, 3 figures, corrected version (Figs.2 and 3)

arxiv created 2007/06/20 · openalex publication_date 2007/11/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We show that the intriguing observation of noise enhancement in the charge transport through two vertically coupled quantum dots can be explained by the interplay of quantum coherence and strong Coulomb blockade. We demonstrate that this novel mechanism for super-Poissonian charge transfer is very sensitive to decoherence caused by electron-phonon scattering as inferred from the measured temperature dependence.

Citations

• Positive cross-correlations due to dynamical channel blockade in a three-terminal quantum dot
• Shot noise in coupled dots and the “fractional charges”
• Electron Bunching in Transport through Quantum Dots in a High Magnetic Field
• Adiabatic transfer of electrons in coupled quantum dots
• Coulomb effects in tunneling through a quantum dot stack
• Shot Noise Spectrum of Open Dissipative Quantum Two-Level Systems
• Shot noise in mesoscopic conductors