[youlweb]

Can we simply tell that the entanglement was collapsed on the other end? That would be sufficient to transmit information. If planet x is habitable when I get there, I measure/collapse this specific particle, whose counterpart is back on earth in a detector named "habitable". When the detector fires on earth because this particle was measured/collapsed on planet x, people on earth know planet x is habitable. There's no need to know the outcome of the measurement, just the fact that it was measured/collapsed is information enough.

[cwillu]

Any time you feel tempted to treat collapse as an objective state of a single particle, remember that the collapse interpretation is mathematically indistinguishable from the multiverse interpretation. There's no test for whether collapse has happened other than measuring at both ends and comparing notes… and noticing that nature appears to be cheating somehow.

[gaze]

You can’t tell AT ALL if there was entanglement with one trial. You need to prepare the same state many many times and compare correlations many many times to establish correlations to within some error bound.

[roywiggins]

This doesn't work, but if it did, you could use it to front-run stock market movements. No need to go to space to find an application.

[gosub100]

even if you could relay that one binary piece of information, that's one bit of an integer or string that could contain arbitrary information.

The only thing that is known is that the other entangled particle has opposite spin than what you register.

[afiori]

A particle with entaglement is undistinguishable from a particle with no entanglement.

[gaze]

We can’t.