2007/06/30 by Rafael Sánchez, Sigmund Kohler, Peter Hänggi +1 · 1 citation
Engineering · Physics and Astronomy · #Absorption (acoustics) #Advancements in Semiconductor Devices and Circuit Design #Asymmetry #Atomic physics #Condensed matter physics #Coupling (piping) #Electron #Laser #Materials science #Noise (video) #Optics #Phonon #Physics #Quantum #Quantum and electron transport phenomena #Quantum decoherence #Quantum dot #Quantum mechanics #Quantum tunnelling #Semiconductor Quantum Structures and Devices #Shot noise #Spontaneous emission #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.77.035409
published as Phys. Rev. B 77, 035409 (2008) · 4 pages, 5 figures. Published version
openalex publication_date 2008/01/09 · arxiv created 2008/01/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 the interaction between different channels together with phonon emission and absorption are responsible for the shot noise characteristics. The observed asymmetry of the peaks at low temperatures stems from spontaneous emission.