Entangled Particles: Can They Be Distinguished?

In summary, in theory, it is not possible to distinguish entangled particles before and after interaction. This is due to the Heisenberg Uncertainty Principle which limits the amount of information that can be obtained from the system. Therefore, it is not possible to determine if one entangled particle has been measured by looking at the other.
  • #1
Learningd
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Dear Learned Physicists,

can anyone educate me on:

is it possible to distinguish entangled particles before and after interaction in theory?

what I'm trying to find out is, if two entangled particles can be separated and one interacted with to produce a result at the other end, such that the other particle can produce a measurement but only after the first one is interacted with.

I hope I am comprehensible above!
 
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  • #2
No, it is not possible to determine if Alice has been measured by looking at Bob. The Heisenberg Uncertainty Principle applies to the system, and that limits the amount of information which you can obtain.
 
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  • #3
Thanks Dr
 

Related to Entangled Particles: Can They Be Distinguished?

1. What are entangled particles?

Entangled particles are two or more particles that have a strong correlation with each other, even when they are separated by large distances. This correlation is known as quantum entanglement and it means that the state of one particle is dependent on the state of the other particle, regardless of the distance between them.

2. How are particles entangled?

Particles can become entangled through a process called quantum entanglement, which occurs when two or more particles interact with each other and become correlated. This can happen through various physical processes such as collision, interaction with a common environment, or through the use of specialized devices.

3. Can entangled particles be distinguished?

No, entangled particles cannot be distinguished from each other. This is because their properties are strongly correlated and the state of one particle cannot be determined without also determining the state of the other particle. This is known as the principle of quantum indistinguishability.

4. What is the significance of entangled particles?

The significance of entangled particles lies in the potential applications in quantum computing and communication. Entanglement allows for the transfer of information between particles instantaneously, which can greatly improve the speed and efficiency of these processes. It also has implications for our understanding of the fundamental principles of quantum mechanics.

5. Can entangled particles be used for faster-than-light communication?

No, entangled particles cannot be used for faster-than-light communication. While the state of an entangled particle can be determined instantly, any information gained from this measurement is still subject to the speed of light. Therefore, entanglement does not violate the speed of light limit and cannot be used for faster-than-light communication.

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