- 911

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Let me illustrate with an example:

Photon A and B are an entangled pair of photons (created by striking photon C on say a BBO crystal etc).

Alice is given photon A and Bob photon B.

is there a way in which we can increase the probability (from 50% to say 60%) of Alice's photon showing spin of +? (of course the entanglement would collapse as soon as interact with A)

Simply put: even if we have just one photon (assume no entanglement) can we influence it in such a way that when we measure we get spin (+)?

if we could do that, then information could be transmitted via the (supposed/hypothetical) "phenomena" of entanglement because photon B now can be used to "read" what was done t photon A.