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Can the total spin state of photons inside a laser beam be written as a product of individual spin states ? Tentatively, the answer seems to be yes because single laser beam have a definite polarization state.

So, is it possible that N-photon spin state inside a laser beam be entangled ?

Can such entanglement arise when we consider multiple laser beams with distinct polarizations colliding at a focal spot ?

I would appreciate if someone could provide reading material on the subject.

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  • $\begingroup$ Please ask one question per post. $\endgroup$
    – my2cts
    Commented Jul 23, 2019 at 10:39
  • $\begingroup$ @my2cts there two questions really..I did not want to open up a new post for the second one since it is closely related to the first question. $\endgroup$
    – user91411
    Commented Jul 23, 2019 at 11:18

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