Eistein Podosky Rosen extended

Context: Graduate
Thread starter NateTG
Start date Apr 2, 2004

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SUMMARY

The discussion centers on a modified version of the Einstein-Podolsky-Rosen (EPR) experiment, which involves measuring spin correlations between entangled positron and electron pairs. The setup includes a linear arrangement of detectors and sources, specifically positron and electron sources, along with Stein-Gerlach type spin orientation detectors. The inquiry focuses on whether the Copenhagen interpretation of quantum mechanics predicts spin correlation in this configuration, suggesting that Bell's theorem may not be necessary to address locality issues. The potential violation of conservation of spin and angular momentum is also highlighted as a critical factor in the experiment's outcomes.

PREREQUISITES

Understanding of quantum mechanics, particularly the Copenhagen interpretation
Familiarity with entangled particle pairs, specifically positrons and electrons
Knowledge of Bell's theorem and its implications for locality
Experience with Stein-Gerlach type spin orientation detectors

NEXT STEPS

Research the implications of the Copenhagen interpretation on entangled particles
Study the principles of Bell's theorem and its relevance to quantum locality
Explore the mechanics of Stein-Gerlach type spin orientation detectors
Investigate conservation laws in quantum mechanics, focusing on spin and angular momentum

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Quantum physicists, researchers in quantum mechanics, and students exploring the implications of entanglement and locality in quantum experiments.

Apr 2, 2004

NateTG

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This is a question about a slightly modified version of the EPR experiment:

The experiment requires:
A source of entangled positron pairs
A source of entangels electron pairs
A pair of Stein-Gerlach type spin orientation detectors.

Let's say that there is a linear arrangement of
Detector - Positron source - Annihillation Chamber - Electron Source - Detector

And, I try to measure correlation between spin states of the electron at one end, and the positron at the other in a fashion similar to that of the EPR experiment.

Does QM - if it matters let's say the Copenhagen interpretation - indicate that there will be spin corellation between the pairs?

This experiment is interesting to me because it creates a situation where Bell's theorem may not be necessary to eliminate locality. Since any 'synconization pulse' would have to have taken place before the electron/postitron pair came into existence. On the other hand, AFAIK, the products of the Positron/Electron interaction have net spin zero, so a lack of correlation would indicate a violation of conservation of spin/angular momentum.