Proposed Rabi-Kondo correlated state in a laser-driven semiconductor quantum dot.
Proposed Rabi-Kondo correlated state in a laser-driven semiconductor quantum dot.
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激光驱动半导体量子点中提出的拉比-近藤相关态
DOI：
10.1103/physrevlett.111.157402
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发表时间：
2013
影响因子：
8.6
通讯作者：
A. Imamoglu
中科院分区：
文献类型：
--
作者：
B. Sbierski;M. Hanl;A. Weichselbaum;H. E. Türeci;M. Goldstein;L. I. Glazman;J. von Delft;A. Imamoglu
单电子带电量子点与巡回电子之间的自旋交换导致了近藤关联的出现。当量子点被微弱的激光共振驱动时，产生的发射光谱允许直接探测这些关联。在交换相互作用消失和强激光驱动的相反极限下，量子点在单自旋态和光激发态之间表现出相干振荡。在这里，我们证明了强交换和非微扰激光耦合之间的相互作用导致了新的非平衡量子关联态的形成，其特征是出现了激光诱导的二次自旋屏蔽云，并研究了其对发射谱的影响。
Spin exchange between a single-electron charged quantum dot and itinerant electrons leads to an emergence of Kondo correlations. When the quantum dot is driven resonantly by weak laser light, the resulting emission spectrum allows for a direct probe of these correlations. In the opposite limit of vanishing exchange interaction and strong laser drive, the quantum dot exhibits coherent oscillations between the single-spin and optically excited states. Here, we show that the interplay between strong exchange and nonperturbative laser coupling leads to the formation of a new nonequilibrium quantum-correlated state, characterized by the emergence of a laser-induced secondary spin screening cloud, and examine the implications for the emission spectrum.