Is Partial Quantum Collapse Possible Through Selective Measurement?

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SUMMARY

The discussion centers on the concept of partial quantum collapse through selective measurement, specifically in the context of entangled particles. It is established that a measurement on one particle of an entangled pair can lead to a partial collapse, allowing the other particle to remain in an uncollapsed state. This phenomenon is exemplified by measuring momentum-position and polarization bases of entangled particles, demonstrating that not all properties need to collapse simultaneously. The implications of this selective measurement challenge traditional views of quantum mechanics.

PREREQUISITES
  • Understanding of quantum mechanics principles
  • Familiarity with quantum entanglement
  • Knowledge of measurement theory in quantum physics
  • Basic concepts of particle physics, specifically leptons
NEXT STEPS
  • Research the implications of selective measurement in quantum mechanics
  • Explore the concept of entangled particles and their properties
  • Study the differences between complete and partial quantum collapse
  • Investigate experimental setups demonstrating partial collapse in quantum systems
USEFUL FOR

Physicists, quantum mechanics researchers, and students interested in advanced quantum theories and the behavior of entangled particles.

Yoni
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Can you make a measurement that doesn't make the particle completely collapse into a single state, but partially collapse dismissing just some of the possible states?
 
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Any attempt to record the properties of a lepton results in an immediate change in the particles properties, and since it has infinite probable locations doing so would achieve nothing.
 
Yoni said:
Can you make a measurement that doesn't make the particle completely collapse into a single state, but partially collapse dismissing just some of the possible states?

Absolutely! A graphic example would be an particle pair entangled on both momentum-position and polarization bases. A basis measurement on one of the pair will leave the other in an uncollapsed state on the other basis. This really applies to any particle anytime, but this example makes it obvious since the resulting remaining entanglement can be observed.
 

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