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Rabi oscillation damping of two-level states in quantum dots

✍ Scribed by D. Mogilevtsev; A.P. Nisovtsev; S. Kilin; S.B. Cavalcanti; H.S. Brandi; L.E. Oliveira

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
162 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

Within a general approach suitable to describe a coherently driven two-level system interacting with a dephasing reservoir, we have proposed various mechanisms to explain the nature of the damping of Rabi oscillations with increasing driving-pulse area in localized two-level semiconductor systems. We have shown that the non-Markovian character of the reservoir leads to the dependence of the dephasing rate on the driving-field intensity, as observed experimentally. Furthermore, we have also shown that stationary as well as non-stationary effects resulting from the coupling to the environment may give rise to intensity-dependent damping of oscillations.

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Acoustic phonon-assisted damping of Rabi
Acoustic phonon-assisted damping of Rabi oscillations in InAs quantum dots
✍ T. Moldaschl; T. MΓΌller; S. Golka; G. Strasser; K. Unterrainer πŸ“‚ Article πŸ“… 2008 πŸ› Elsevier Science 🌐 English βš– 183 KB

Excitonic ground state Rabi oscillations in InAs quantum dots are studied via an ultrafast spectral hole burning technique. From comparison with frequency domain data, we find that acoustic phonon-induced dephasing processes damp the oscillations.