声子作用下连续驱动量子点的时间分辨泵浦-探测信号
Time-resolved pump-probe signals of a continuously driven quantum dot affected by phonons
摘要：
在光控半导体量子点中可以研究光场与量子力学系统的相互作用。当被瞬间开启的连续光场驱动时，量子点占据执行拉比振荡。与原子系统不同，量子点与声子耦合，这导致拉比振荡的阻尼。在这里，我们模拟的时间分辨探测光谱监测这些动力学和研究声子的光谱上的影响。光谱由多达三个峰组成，类似于量子光学中已知的莫洛三重态。我们开发的速率方程模型内的分析方程，并表明，他们同意优秀的数值解，使用一个行之有效的相关展开方法。
英文摘要：
The interaction of a light field with a quantum-mechanical system can be studied in an optically controlled semiconductor quantum dot. When driven by a continuous light field switched on instantaneously, the quantum dot occupation performs Rabi oscillations. Unlike an atomic system, the quantum dot is coupled to phonons, which leads to a damping of the Rabi oscillations. Here we model the time-resolved probe spectra to monitor these dynamics and study the influence of phonons on the spectra. The spectra consist of up to three peaks, similar to the Mollow-triplet known from quantum optics. We develop analytical equations within a rate equation model and show that they agree excellently with a numerical solution using a well established correlation expansion approach.
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