Einstein's 'spooky action' common in large quantum systems

[blackzeus]

A real life ansible

It would be crazy to imagine, since you could communicate with a person at distances faster than light. So would you be communicating in the future, or past? There is no spoon

So basically, once they figure out the PPT for various types of particles, etc, using particle spin, you can manipulate data instantly over ridiculous amounts of distances. You could also use it as a locator perhaps of other life, if you can find PPT at the molecular level. Ya, this is crazy sh*t, that parallel universe sh*t. Perhaps Newton's theories extend to the subatomic level? "For each and every action, there is an equal and opposite reaction". Somewhere on another planet, somewhat is deleting what I am typing

 

[Prodigital]

can someone explain how they can identify the entangled electrons?

As far as i understand...

First, two particle HAVE TO interact with each other LOCALLY. Afterwards, move them anywhere away from each other in the universe. Then impose a spin on one of the particles, and as research goes, the other particle will have a correlated spin instantaneously.

Spin is kind of hard to explain tho, but for electrons its sorta like how earth rotates on a axis as it rotates around the sun. Each particle/planet can have its own spin, and we've found ways to manipulat that value, but particle spin isn't in the traditional since because 360 degrees isn't always a full rotation. Its usefulness is in detecting whether the spin is positive or negative.

 

[Hawaiian Punch]

aren't we due for some earth shattering technological breakthrough that changes the way we travel/communicate forever? I hope I live to see it because it just seems like it's coming

Well in terms of communication the Internet connected humanity and is essentially a type 1 civilization communication device. But I see what you are saying. Between the physics being uncovered in the large hadron, as well as quantum computing we are close to entering the singularity of our civilization

 

[Majestyx]

So basically, once they figure out the PPT for various types of particles, etc, using particle spin, you can manipulate data instantly over ridiculous amounts of distances. You could also use it as a locator perhaps of other life, if you can find PPT at the molecular level. Ya, this is crazy sh*t, that parallel universe sh*t. Perhaps Newton's theories extend to the subatomic level? "For each and every action, there is an equal and opposite reaction". Somewhere on another planet, somewhat is deleting what I am typing

so its like everything is entangled on one level or another..

 

[NubianVitruvian]

Accept that life works in ways we didn't expect it to. It's been like this since the universe was created. Just , accept the impossible magic, and get us teleporting to Mars

 

[acri1]

Instantaneous communication regardless of distance/impedance..............​

Would be nice, but nah.


Curious About Astronomy: Does quantum entanglement imply faster than light communication?

Does quantum entanglement imply faster than light communication?

I read the questions and answers here. You seem quite convinced that information cannot travel faster than light.

However, as I read it, I clearly remembered an article send out by NASA, which describes the possibilities and exciting consequences of the proberty called entanglement. You can find it here. Do you and your fellow colleuges simply not believe in it, or is this new results which will change our interpretation of relative physics?

Great question! Quantum entanglement is a really interesting phenomena and one that we all enjoyed worrying about in our quantum mechanics and relativity classes!

The way people get around the idea that entanglement implies instantaneous communication is that no actual information is passed when the entangled particles affect each other. The arguement is as follows (using a non-QM example):

Say you agree to send out two beams of light to your two friends who live on opposite sides of the galaxy (you live in the middle). Ahead of time you tell them that if one of the beams of light is red the other will be blue. So you send the blue beam to your friend on one side and immediately she knows that your other friend is recieving a red beam at the same time. Aha! You say, my friends have now communicated at a speed faster than the speed of light and violated relativity, but no real information has been passed between them. You have told both of them at a normal sub-luminal speed about what you just did and that's all. (A way of proving there's no faster than light communication is that you could lie and send them both the same coloured beam of light and they would never know!).

With QM is gets a bit more complicated because theoretically no-one knows the state of the particle until it has been observed, but you still cannot affect the state of the particle so the arguement is the same.

 

[.༼-◕_◕-༽.]

Good post... So in the classic QM dilemma, making an observation or taking a measurement still forces the system to "take a stand" which affects the system...