Most of the quantum cutting systems hitherto is fluoride, which have no practical value due to their low stability, low absorbability and low energy conversion efficiency under VUV exciting.

科学家们已经证实的量子剪裁体系多为氟化物，由于它们在VUV下的不稳定性和氟化物的活性，以及氟化物基质在VUV波段的弱吸收、能量转换效率低，所以没有实际应用价值。

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Spontaneous Parametric Down-conversion(SPDC); correlated photon; quantum-efficiency; coincidence count;

自发参量下转换； 相关光子； 量子效率； 符合计数；

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