Quantum entanglement,Is it possible

[adarshtr]

Is Quantum entanglement really true ?, they say that that have observed it with photons and the distance between the photons doesn't matter , If this is true then information must travel faster than the speed of light right ? how is this possible ?

 

[ibysaiyan]

Yes , that depends in what context you take the word 'information' into account.
I am not greatly detailed on this but one way of achieving entanglement is by splitting particles into two integer spins ( half i think for the case of electrons) , each having +1/2 and -1/2 intrinsic angular spin .

In other words say particle 'A' splits into 'B' and 'C' as such they are moved to an arbitrary distance apart , if we measure 'A' to be 1/2 or vice verca , the other part takes -1/2 orientation ( i think) to conserve angular momentum.


-ibysaiyan

 

[ThomasT]

Is Quantum entanglement really true?

Yes, it's true that there's a formal description of, and experimental realization of, something called quantum entanglement.

... they say that that have observed it with photons and the distance between the photons doesn't matter ...

That's right, as long as the entanglement can be preserved.

If this is true then information must travel faster than the speed of light right?

No.

... how is this possible?

Quantum entanglement has to do with relationships between entangled entities measured by global measurement parameters. So, as long as the relationship can be preserved, then the entanglement can be demonstrated.

 

[DrChinese]

Is Quantum entanglement really true ?, they say that that have observed it with photons and the distance between the photons doesn't matter , If this is true then information must travel faster than the speed of light right ? how is this possible ?

Welcome to PhysicsForums, adarshtr!

Yes, quantum entanglement is a demonstrated phenomenon. There have been thousands of experiments performed which demonstrate this in all kinds of ways. This demonstrates what is known as quantum non-locality. What travels faster than the speed of light is not information exactly, it is often referred to as wave function (or state) collapse. As far as anyone knows, there is no way to use this to transmit a signal faster than c.