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If 4-fold photons which are bunched from an attenuated classical source are polarized at 45 degree (diagonally polarized) and put into polarizing beam splitter, two of them are reflected and the other two are transmitted? Is there a case where one is reflected and three are transmitted?

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  • $\begingroup$ Draw a sketch to explain what you mean. And by folded do you mean entangled? $\endgroup$ Jun 12, 2021 at 3:34
  • $\begingroup$ Added figure. It means bunched photon belonging to classical light. But it doesn't matter if they're entangled because I don't see any difference. $\endgroup$
    – 김상배
    Jun 12, 2021 at 6:55

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If the beam splitter is a non-polarising device and the setup is ideal, then statistically 50% of the photons go in one direction and 50% in the other.

But this does not mean that at any point in time the ratio is 2:2. All other scenarios - with lower probability - are possible: 4:0, 3:1, 1:3 and 0:4.

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  • $\begingroup$ Thank you for your interest in my question. It is useful. $\endgroup$
    – 김상배
    Jun 12, 2021 at 12:27

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