2008/06/11 by Bing Dong, X. L. Lei, N. J. M. Horing · 18 citations
Computer Science · Physics and Astronomy · #Coulomb #Interferometry #Noise (video) #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum noise #Quantum optics and atomic interactions #Quantum tunnelling #Rabi frequency #Shot noise #Spectrum (functional analysis) #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.2967710
published in Journal of Applied Physics 104(3) (American Institute of Physics) · 8 pages, 5 figures
arxiv created 2008/06/11 · openalex publication_date 2008/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We examine the shot noise spectrum properties of coherent resonant tunneling in coupled quantum dots (CQDs) 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 Ω and Ω/Γ≳1 (Γ denotes the dot-lead tunnel-coupling strength), the noise spectrum exhibits a dip at the Rabi frequency 2Ω 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 the enclosed magnetic flux.