Phonon-assisted decoherence and tunneling in quantum dot molecules
| Autor: | Jens Förstner, Anna Grodecka-Grad |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Physics
Quantum decoherence Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Phonon Relaxation (NMR) Time evolution FOS: Physical sciences Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Quantum dot Picosecond Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Molecule Condensed Matter::Strongly Correlated Electrons Quantum tunnelling |
| DOI: | 10.48550/arxiv.1011.2857 |
| Popis: | We study the influence of the phonon environment on the electron dynamics in a doped quantum dot molecule. A non-perturbative quantum kinetic theory based on correlation expansion is used in order to describe both diagonal and off-diagonal electron-phonon couplings representing real and virtual processes with relevant acoustic phonons. We show that the relaxation is dominated by phonon-assisted electron tunneling between constituent quantum dots and occurs on a picosecond time scale. The dependence of the time evolution of the quantum dot occupation probabilities on the energy mismatch between the quantum dots is studied in detail. Comment: 4 pages, 2 figures, conference proceeding NOEKS10, to be published in Phys. Stat. Sol |
| Databáze: | OpenAIRE |
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