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Finite-frequency current (shot) noise in coherent resonant tunneling through a coupled-quantum-dot interferometer
- Source :
- J. Appl. Phys. {\bf 104}, 033532 (2008).
- Publication Year :
- 2008
-
Abstract
- We examine the shot noise spectrum properties of coherent resonant tunneling in coupled quantum dots 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 $\Omega$, $\Omega/\Gamma\gtrsim 1$ ($\Gamma$ denotes the dot-lead tunnel-coupling strength), the noise spectrum exhibits a dip at the Rabi frequency, $2\Omega$, 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 enclosed magnetic-flux.<br />Comment: 8 pages, 5 figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- J. Appl. Phys. {\bf 104}, 033532 (2008).
- Publication Type :
- Report
- Accession number :
- edsarx.0806.1780
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.2967710