Is Time Travel Possible with Entangled Particles?

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    Entanglement Relativity
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SUMMARY

The forum discussion centers on the implications of quantum entanglement and relativity, particularly regarding the measurement of entangled particles like photons and electrons. It establishes that measurements of entangled particles are correlated, but the order of measurement is not invariant due to spacelike separation. The discussion highlights a scenario involving a spaceship and Earth, where relativistic speeds complicate the understanding of measurement order and correlation. Ultimately, the conversation concludes that while measurements are correlated, one cannot determine the outcome of one measurement based on the other without violating the principles of relativity.

PREREQUISITES
  • Understanding of quantum entanglement and measurement
  • Familiarity with relativistic physics and time dilation
  • Knowledge of spacelike and timelike intervals in physics
  • Basic concepts of quantum mechanics, including measurement correlation
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  • Research "Bell's Theorem and its implications" to understand the foundations of quantum entanglement.
  • Study "Quantum Measurement Theory" to explore how measurements affect quantum states.
  • Investigate "Relativity and Quantum Mechanics" to comprehend the interplay between these two fundamental theories.
  • Examine "Spacelike and Timelike Separation" to grasp the significance of measurement order in quantum experiments.
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Physicists, quantum mechanics students, and anyone interested in the intersection of quantum theory and relativity will benefit from this discussion.

  • #31
snuz2001 said:
So what is the answer? Can Bob’s late measurement affected Alice’s earlier?

Nobody knows the answer. At least one QM interpretation, retrocausality, allows later measurements to affect earlier ones. Nobody has found a way to experimentally test one QM interpretation vs. another, so as far as anyone knows retrocausality is still a possibility, at least in principle.

I know you would like there to be a definitive answer, but as has already been pointed out several times, this is one of those cases where we don't have one at our current state of knowledge.
 
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  • #32
The OP question has been addressed as well as it can be. Thread closed.
 

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