Quantum Entanglement: Measuring Particles & Retaining Entanglement

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SUMMARY

In quantum entanglement, when two photons are entangled, measuring the spin of one photon directly determines the spin of the other. However, once one of the particles is measured, it does not retain its entanglement. Consequently, repeated measurements on photon A will not yield additional information about photon B's spin, as each particle can only be measured once in this context.

PREREQUISITES
  • Understanding of quantum mechanics principles
  • Familiarity with photon behavior in quantum systems
  • Knowledge of spin measurement in quantum physics
  • Basic grasp of entanglement concepts
NEXT STEPS
  • Research the implications of quantum measurement on entangled particles
  • Explore the concept of Bell's theorem and its relevance to entanglement
  • Study the role of quantum states in particle entanglement
  • Investigate experimental setups for measuring photon entanglement
USEFUL FOR

Physicists, quantum mechanics students, researchers in quantum information science, and anyone interested in the principles of quantum entanglement.

Ryan Reed
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When two photons' spins are entangled, measuring one spin gives you the spin of the other. My question is, after one of the particles is measured, does it still retain its entanglement? Could you keep measuring photon A's spin to get photon B's spin?
 
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No. You get at most one measurement on each particle.
 

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