NDLI: Fano effect in a double T-shaped interferometer

Content Provider	Springer Nature Link
Author	Moldoveanu, V. Dinu, I. V. Tanatar, B.
Copyright Year	2009
Abstract	We study the coherent transport in a one-dimensional lead with two side-coupled quantum dots using the Keldysh’s Green function formalism.The effect of the interdot Coulomb interaction is taken into account by computing the firstand second order contributions to the self-energy.We show that the Fano interference due to the resonance of one dotis strongly affected by the fixed parameters that characterize the second dot. If the second dot is tuned close to resonance an additionalpeak develops between the peak and dip of the Fano line shape of the current. In contrast, when the second dotis off-resonance and its occupation number is close to unity the interdot Coulomb interaction merely shifts the Fano line and no other maxima appear.The system we consider is more general than the single-dot interferometer studied experimentally by Kobayashi et al. [Phys. Rev. B 70, 035319 (2004)] and may be used for controlling quantum interference and studying decoherence effects in mesoscopic transport.
Starting Page	231
Ending Page	238
Page Count	8
File Format	PDF
ISSN	14346028
Journal	The European Physical Journal B
Volume Number	67
Issue Number	2
e-ISSN	14346036
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-01-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Superconductivity, Superfluidity, Quantum Fluids Solid State Physics and Spectroscopy Fluids Complexity Physics Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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