Perovskites-compounds with the CaTiO3-type crystal structure-show outstanding performance in photovoltaics and multiparameter optical emitters due to their large oscillator strength, strong solar absorption, and excellent charge-transport properties. However, the ability to realize and control many-body quantum states in perovskites, which would extend their application from classical optoelectronic materials to ultrafast quantum operation, remains an open research topic. Here, we generate a cooperative quantum state of excitons in a quantum dot ensemble based on a lead halide perovskite, and we control the ultrafast radiation of excitonic quantum ensembles by introducing optical microcavites. The stimulated radiation of excitonic quantum ensemble in a superlattice microcavity is demonstrated to not be limited by the classical population-inversion condition, leading to a picosecond radiative duration time to dissipate all of the in-phase dipoles. Such a perovskite-assembly superlattice microcavity with a tunable radiation rate promises potential applications in ultrafast, photoelectric-compatible quantum processors.

中文翻译：

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钙钛矿组装超晶格微腔中的合作激子量子集合。

具有钙钛矿型CaTiO3型晶体结构的钙钛矿化合物由于其大的振荡器强度，强的太阳吸收性和出色的电荷传输性能而在光伏电池和多参数光发射器中显示出出色的性能。但是，实现和控制钙钛矿中多体量子态的能力（将其应用范围从经典的光电材料扩展到超快量子操作）仍然是一个开放的研究课题。在这里，我们基于卤化钙钛矿铅在量子点集合体中产生激子的协作量子态，并通过引入光学微腔来控制激子量子体的超快辐射。激子量子腔在超晶格微腔中的受激辐射被证明不受经典的种群反转条件的限制，导致皮秒辐射持续时间消散所有同相偶极子。这种具有可调辐射率的钙钛矿组件超晶格微腔有望在超快，光电兼容量子处理器中得到潜在应用。