•
𝒏
𝒎
𝑠1, … , 𝑠𝑚 𝑡1, … , 𝑡𝑚
Prob 𝑆 → 𝑇 = 𝑇 𝑈 𝑆 2 =per 𝑈𝑆𝑇
2
𝑠𝑗! 𝑡𝑗!
per 𝐴 = 𝑎𝑖,𝜎(𝑖)
𝑚
𝑖=1𝜎∈𝑆𝑚
Spontaneous parametric
Down-conversion
U
7
𝐶37,27
3
4
5
6
1
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