Entagled pair and speed of light

[edpell]

Has anyone ever done an experiment with an entangled pair (say a pair of photons of opposite spin) where both are measured at the same time (or at least a time less than the separation, d, of the two particles divided by the speed of light, d/c)?

Less than d/c and more than d/c seem to be importantly different.

 

[QuantumClue]

Why, what do you suspect it would achieve?

 

[JesseM]

Yes, many tests of Bell inequalities (all of which involve entangled particles) have closed the so-called locality loophole.