Quantum entanglement,Is it possible

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Discussion Overview

The discussion revolves around the validity and implications of quantum entanglement, particularly focusing on its experimental observations with photons and the concept of information transfer in relation to the speed of light. The scope includes theoretical and conceptual aspects of quantum mechanics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants question the reality of quantum entanglement and its implications for information transfer, particularly whether it allows for faster-than-light communication.
  • One participant describes a method of achieving entanglement through the splitting of particles and discusses the conservation of angular momentum in this context.
  • Another participant confirms the existence of quantum entanglement and emphasizes that while it has been experimentally verified, the concept of information traveling faster than light is not accurate.
  • A later reply clarifies that what is observed in entanglement is related to wave function collapse rather than the transmission of information, asserting that no method exists to send signals faster than the speed of light.

Areas of Agreement / Disagreement

Participants express differing views on the implications of quantum entanglement for information transfer, with some asserting that it does not allow for faster-than-light communication, while others raise questions about the nature of information in this context. The discussion remains unresolved regarding the interpretation of these concepts.

Contextual Notes

There are limitations in the discussion regarding the definitions of 'information' and the assumptions underlying the interpretations of quantum entanglement and wave function collapse.

adarshtr
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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 ?
 
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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
 
adarshtr said:
Is Quantum entanglement really true?
Yes, it's true that there's a formal description of, and experimental realization of, something called quantum entanglement.

adarshtr said:
... 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.

adarshtr said:
If this is true then information must travel faster than the speed of light right?
No.

adarshtr said:
... 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.
 
adarshtr said:
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.
 

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