Harbusch, D. and Taubert, D. and Tranitz, H. P. and Wegscheider, W. and Ludwig, S. (2010) Phonon-Mediated versus Coulombic Backaction in Quantum Dot Circuits. PHYSICAL REVIEW LETTERS, 104 (19): 196801. ISSN 0031-9007,
Full text not available from this repository.Abstract
Quantum point contacts (QPCs) are commonly employed to detect capacitively the charge state of coupled quantum dots (QDs). An indirect backaction of a biased QPC onto a double QD laterally defined in a GaAs/AlGaAs heterostructure is observed. Energy is emitted by nonequilibrium charge carriers in the leads of the biased QPC. Part of this energy is absorbed by the double QD where it causes charge fluctuations that can be observed under certain conditions in its stability diagram. By investigating the spectrum of the absorbed energy, we find that both acoustic phonons and Coulomb interaction can be involved in the backaction, depending on the geometry and coupling constants.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRONS; NOISE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Jul 2020 11:09 |
| Last Modified: | 30 Jul 2020 11:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/24734 |
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