Then state function of SPDC biphoton light field was derived and a probability explanation was given.

推导自发参量下转换双光子态的数学表达式，并给出其几率解释。

youdao

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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We theoretically analyzed the effect of both pump and detection bandwidth to the distribution range of photon pairs generated by SPDC process.

分析了泵浦光的谱宽以及测量所选用的滤波器的带宽对下转换产生的信号光和闲置光分布范围影响。

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"There has to be a very clear and consistent and regular reinforcement of the message that this type of engagement does not mean a tacit endorsement of the SPDC's crimes against humanity or its ongoing violations of human rights."

VOA: standard.2009.09.24

Fearing continued attacks, SPDC announced it was temporarily shutting down operations that will amount to a production loss of 455, 000 barrels per day -- 19 percent of Nigeria's output.

CENTERFORSECURITYPOLICY: Nigeria ablaze