3 ms·
If you take two entangled photons, send each a light year away in opposite directions. Now an satellite (which are 2ly from one another at each endpoint measur
by aeternum 4y ago
If you take two entangled photons, send each a light year away in opposite directions. Now an satellite (which are 2ly from one another at each endpoint measures the polarization). Each satellite measures the spin along a specific axis.
The correlation in spin measured by the two satellites is dependent upon the difference in angle of the two measurements. Correlation with the local stuff around each satellite isn't enough. Somehow, the choice of measurement angle seems to be non-local (transmitted at large distances and at greater than light speed).