This is a great analogy. Consider it stolen.
Comment on Light-Speed Spaceships Would Have Trouble Phoning Home
KISSmyOS@lemmy.world 11 months agoQuantum entanglement is like ripping a photo in half, putting both halves in seperate envelopes and carrying them to opposite ends of the world.
As soon as you open your envelope, you instantly know which half of the photo is on the other side of the planet - Faster Than Light Information Transfer!
luthis@lemmy.nz 11 months ago
INeedMana@lemmy.world 11 months ago
So it’s not like: when I affect the hue (some attribute) of my half, the other half will change too? That has always been my understanding of it
SpacetimeMachine@lemmy.world 11 months ago
No, measuring one particle collapses the entanglement and they no longer affect each other. It is a one time thing. You can’t modify them after they have been observed.
intensely_human@lemm.ee 11 months ago
So at best it can be used for unpredictable coordination between vastly-spaced armies.
SpacetimeMachine@lemmy.world 11 months ago
Nope. Because you don’t know when it will collapse,. Imagine you have 2 balls, a red and a blue. They are both put in boxes and each ship takes 1 box. After you travel a long distance you open your box. You have just collapsed the “superposition” of what color the balls were. You now know what color both balls are, but you don’t know if the other person has looked in their box yet.
I think a lot of people get confused by the term “observe” when talking about collapsing quantum uncertainty. Observing requires a photon to interact with the particle which is what caused it to “choose” what state it is in.
xkforce@lemmy.world 11 months ago
For a variety of reasons, no information is actually transfered. Quantum entanglement can not be used to get around the limits imposed by relativity.
KISSmyOS@lemmy.world 11 months ago
That’s what I was trying to illustrate.
intensely_human@lemm.ee 11 months ago
Illustrate?? I thought you were talking about photographs