SonOfOnett t1_j22snxg wrote on December 29, 2022 at 5:59 AM

Reply to comment by Ecl1psed in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator

The problem with your argument is you are saying Alice is going to measure a 1: that’s a hidden variable you are introducing into the thought experiment! In reality and experiment, regardless of who measures first, we don’t know what the outcome of that first measurement will be.

You need to stop after stating that Bob and Alice’s particles are entangled to have the same measurement. Given that, neither observer, no matter how close in time to the start of the entanglement will know what they are going to measure, just that their measurements will match.

Veritasium has a decent video on Bells Inequality that may be useful to you as well. It explains how we can tell the difference between a local hidden variable or not

Ecl1psed t1_j24gd5s wrote on December 29, 2022 at 4:22 PM

I assumed that Alice measures a 1 because the argument would be the same no matter what she measures. Just replace the 1 with -1 and the logic still works. (Basically, "without loss of generality"). Or, I could have some variable X that represents Alice's measurement. We don't know X until Alice actually performs the measurement, but I think the argument should still work if we just replace all instances of 1 with X. I'll have a look at that Veritasium video, thanks for mentioning it.