Re:How Bell’s Theorem proved ‘spooky action at a distance’ i...
by kgwgk on Tuesday July 20, 2021 @09:02PM
(#27901117)
> I make a measurement when I show you the color of a ball
You “make a measurement” well before that, when you say that you have a red ball and a blue ball.
The point of entanglement is that until you make a measurement they don’t have a color. You could measure something else than color and you would also find a correlation.
But if they have a defined color the entanglement is broken. Sure, one is red and the other is blue. But if you measure anything else (a non-commuting observable, that is) there will be no correlatiom.
And not knowing which one is what (already defined) color is not a superposition. It’s just a mixture.
You “make a measurement” well before that, when you say that you have a red ball and a blue ball.
The point of entanglement is that until you make a measurement they don’t have a color. You could measure something else than color and you would also find a correlation.
But if they have a defined color the entanglement is broken. Sure, one is red and the other is blue. But if you measure anything else (a non-commuting observable, that is) there will be no correlatiom.
And not knowing which one is what (already defined) color is not a superposition. It’s just a mixture.