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Sorry for my bad english!

Please, I'm trying to understand a delayed choice entanglement swapping and I'm having trouble at understanding the outcomes of measuring photons that are enangled in phi + and - states in RL, HV and +- basis?

I know that entanglement in phi + state mean that:

If we measure 0 in one qubit, we will measure 0 in the other qubit (and if we measure 1, the other will be 1).

If we measure + in one qubit, we will measure + in the other qubit (and if we measure -, the other will be -).

And if we have an entanglement in phi - state:

If we measure 0 in one qubit, we will measure 0 in the other qubit (and if we measure 1, the other will be 1).

If we measure + in one qubit, we will measure - in the other qubit (and if we measure -, the other will be +).

So, I expect that: If we have and entanglement in phi + state:

If we measure R in one qubit, we must ALWAYS measure R in the other qubit.

If we measure L in one qubit, we must ALWAYS measure L in the other qubit.

If we measure H in one qubit, we must ALWAYS measure H in the other qubit.

If we measure V in one qubit, we must ALWAYS measure V in the other qubit.

If we measure + in one qubit, we must ALWAYS measure + in the other qubit.

If we measure - in one qubit, we must ALWAYS measure - in the other qubit.

AND:

If we have and entanglement in phi - state:

If we measure R in one qubit, we must ALWAYS measure R in the other qubit.

If we measure L in one qubit, we must ALWAYS measure L in the other qubit.

If we measure H in one qubit, we must ALWAYS measure H in the other qubit.

If we measure V in one qubit, we must ALWAYS measure V in the other qubit. If we measure + in one qubit, we must ALWAYS measure - in the other qubit.

If we measure - in one qubit, we must ALWAYS measure + in the other qubit.

Please, am I right?

Thanks!

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closed as unclear what you're asking by WillO, ZeroTheHero, Jon Custer, John Rennie, Kyle Kanos Feb 12 at 11:13

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  • $\begingroup$ I don't know what "enangled in phi + and - states in RL, HV and +- basis" means, and I'll be surprised if anyone else does. Can you just write down the state you're assuming and the eigenstates for your measurements in terms of some explicit basis? $\endgroup$ – WillO Feb 10 at 14:29
  • $\begingroup$ Sure! I mean photons entangled in the Bell state phi + or phi -, and we measure their polarization in the HV, RL and +-. $\endgroup$ – Joao Victor Feb 10 at 14:32