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Coherent phenomena and dynamics of lead halide perovskite nanocrystals for quantum information technologies

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Abstract

Solution-processed colloidal nanocrystals of lead halide perovskites have been intensively investigated in recent years in the context of optoelectronic devices, during which time their quantum properties have also begun to attract attention. Their unmatched ease of synthetic tunability and unique structural, optical and electronic properties, in conjunction with the confinement of carriers in three dimensions, have motivated studies on observing and controlling coherent light–matter interaction in these materials for quantum information technologies. This Review outlines the recent efforts and achievements in this direction. Particularly notable examples are the observation of coherent single-photon emission, evidence for superfluorescence and the realization of room-temperature coherent spin manipulation for ensemble samples, which have not been achieved for prototypical colloidal CdSe nanocrystals that have been under investigation for decades. This Review aims to highlight these results, point out the challenges ahead towards realistic applications and bring together the efforts of multidisciplinary communities in this nascent field.

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Fig. 1: Exciton fine structure of LHP NCs.
Fig. 2: Stable and coherent single-photon emission from LHP NCs.
Fig. 3: SF from assemblies of LHP NCs.
Fig. 4: Coherent fine-structure exciton dynamics and control.
Fig. 5: Coherent spin dynamics in LHP NCs.
Fig. 6: Coherent spin manipulation using optical pulses.

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Acknowledgements

K.W. acknowledges financial support from the Chinese Academy of Sciences (YSBR-007), Dalian Institute of Chemical Physics (DICP I202106) and the Fundamental Research Funds for the Central Universities (20720220009). K.W. also acknowledges the New Cornerstone Science Foundation through the XPLORER PRIZE.

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K.W. proposed the topic and main organization of the paper, with help from J.Z. and Y.L. J.Z., Y.L., X.L., Y.H. and K.W. participated in writing and discussions. J.Z. and Y.L. contributed equally to this work.

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Zhu, J., Li, Y., Lin, X. et al. Coherent phenomena and dynamics of lead halide perovskite nanocrystals for quantum information technologies. Nat. Mater. (2024). https://doi.org/10.1038/s41563-024-01922-z

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