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Spontaneous generation of entangled exciton in quantum dot systems

机译:量子点系统中自激产生纠缠激子

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We calculate the time evolution of single-exciton states prepared for ensembles of two to four quantum dots. Each dot is considered a two-level system, but with slightly different excitation energies and dipole moments. The dots interact via a tunnel coupling which induces excitation transfer between single emitters, but conserves the total occupation of the system. We show that the initial exciton may evolve towards a steady state where the energy is partially trapped due to the formation of the subradiant (dark) states of the system. In the steady state the individual populations of each dot have permanent oscillations with frequencies given by the energy separation between the subradiant eigenstates.
机译:我们计算为两个到四个量子点的集合准备的单激子态的时间演化。每个点被认为是两级系统,但是具有不同的激发能和偶极矩。这些点通过隧道耦合相互作用,该隧道耦合在单个发射器之间引发激发转移,但保留了系统的总占用量。我们表明,初始激子可能会演化为稳态,在该稳态下,由于系统的亚辐射(暗)态的形成,部分能量被捕获。在稳态下,每个点的个体种群具有永久振荡,其频率由次辐射本征态之间的能量间隔给定。

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