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QMC 6 0 0 a m 9 4 5 am Room: 203 Coupling and Coherence In quantum Dots Ulrike K. Wopgon, Unir ofDortmund, Gemany, Prerider Q M C I 8 0 0 am QMCl Fig. 1. Crowpolarized pump-probe spectra : I I / I " 1QMCl Fig. 2. Co-polarized pump-probe spectra.QMCI Fig. 3. Differential tranmision close to the hiexcitanic resonance.nonlinear spectra for multi-excitons levels we derive from QD. In the inset we see the Rabi splittingofthelowesttwo peaks.Thesplittingisequa1to the Rahi energy of the pump field. This would corres and to the Rabi oscillation in the time domain! For the co-polarized configuration we time integrate the Schhrdingerequation to get the spectra. Fig. 2 shows the calculated spectra. The lowest peak show the characteristic Mollow-type line shape.' We investigate the best scenario in which the Rahi splitting can be observed in a differential transmission experiment. We believe that an Autler-Tomes configuration' based on the presence of the hiexiton should give the clearest signature (see fig. 3). We estimate that the pump intensity need to be increased by an order of magnitude compared to the current experiment before one can observe the onset of Rabi splitting clearly.The work is supported hyAR0 F005010 and NSF DMR-0099572. References1.

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