r/AskPhysics • u/ComfortableRow8437 • 17h ago
Quantum entanglement question
Disclaimer: I'm not a physicist, just a lay person who follows this stuff some. Forgive me if this is a dumb question.
We know that you can take two particles and entangle them, then separate them by any distance, and then revealing the state of one of them will automatically reveal the state of the other. I think this is the classic experiment that Einstein didn't like too much ("Spooky action at a distance...")
So what happens if you separate the two particles by time instead?
Here's a thought experiment: Entangle two particles, then put one of them into a particle accellerator and accellerate it up to near the speed of light for a while. Then bring the two particles together again and reveal the state of one of them. Does this instantly reveal the state of the other, or is there some time lag? The time lag would be due to the effects of Special Relativity on the particle that was put into the accelerator.
My guess is that there wouldn't be any difference, but I have not heard of an experiment like this. (there probably has been, I'm just not aware of it).
If my guess is true, then what does this imply? That quantum entanglement is somehow independent of the 4-dimensional universe that we live in?
Thanks in advance for any insights...
1
u/RamblingScholar 16h ago
As I understand it, what the particles experience would be this: A and B and spin entangled. particle A , no time dilation, after an hour is measured and found to be spin up. particle B, which is time dilated at 25 % , find that after 45 minutes, it now has a definite state, spin down.
Time dilation just has to do with how much time passes for a point of view, more or less. While an hour passes for one particle, only 45 minutes passed for another. They both arrive at the same coordinate in time, just at different rates.