Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-11-11
Ukr. J. Phys. 55 (2010), 85
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 7 figures, to appear in UJP (Ukr.J.Phys.)
Scientific paper
Time-dependent electron transport through a quantum dot and double quantum dot systems in the presence of polychromatic external periodic quantum dot energy-level modulations is studied within the time evolution operator method for a tight-binding Hamiltonian. Analytical relations for the dc-current flowing through the system and the charge accumulated on a quantum dot are obtained for the zero-temperature limit. It is shown that in the presence of periodic perturbations the sideband peaks of the transmission are related to combination frequencies of the applied modulations. For a double quantum dot system under the influence of polychromatic perturbations the quantum pump effect is studied in the absence of source-drain and static bias voltages. In the presence of spatial symmetry the charge is pumped through the system due to broken generalized parity symmetry.
Hänggi Peter
Köhler Simone
Kwapinski Tomasz
No associations
LandOfFree
Dynamically broken symmetry in periodically gated quantum dots: Charge accumulation and dc-current does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dynamically broken symmetry in periodically gated quantum dots: Charge accumulation and dc-current, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamically broken symmetry in periodically gated quantum dots: Charge accumulation and dc-current will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-149728