Decoherence and current fluctuations in tunneling through coupled quantum dots

G Kiesslich, Peter Samuelsson, Andreas Wacker, E Schöll

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceeding

Sammanfattning

The electronic transport through two coupled quantum dots in series can be described either in a fully coherent approach (e.g. density matrix description or nonequilibrium Green's functions) or in a simple sequential tunneling treatment (Pauli master equation with Fermi's Golden rule for coupling between the quantum dots). It turns out that both descriptions provide the same average current for noninteracting electrons. In contrast, the zero-frequency spectral power density and the skewness are different for intermediate coupling strengths between the quantum dots reflecting their sensitivity on coherence in the tunneling process.
Originalspråkengelska
Titel på värdpublikation[Host publication title missing]
FörlagAmerican Institute of Physics (AIP)
Sidor439-441
Volym780
DOI
StatusPublished - 2005

Publikationsserier

Namn
Volym780
ISSN (tryckt)0094-243X
ISSN (elektroniskt)1551-7616

Ämnesklassifikation (UKÄ)

  • Den kondenserade materiens fysik

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