How is Hardy's Paradox resolved in quantum mechanics?

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SUMMARY

Hardy's Paradox is resolved by understanding that measurement alters the properties of quantum systems. In the Copenhagen Interpretation, measurement creates properties that do not exist prior, while Bohm's theory posits that properties are influenced instantaneously by interactions between distant particles. This distinction highlights fundamental differences in interpreting quantum mechanics and the implications for reality as understood in both frameworks.

PREREQUISITES
  • Quantum mechanics fundamentals
  • Copenhagen Interpretation of quantum mechanics
  • Bohmian mechanics
  • Understanding of measurement theory in quantum physics
NEXT STEPS
  • Study the implications of measurement in quantum mechanics
  • Explore the differences between the Copenhagen Interpretation and Bohm's theory
  • Review Hardy's Paradox in detail, particularly in the context of quantum entanglement
  • Examine Secs 5.5 and 5.6 of the paper referenced in the discussion
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Students of quantum mechanics, physicists exploring interpretations of quantum theory, and researchers interested in the philosophical implications of measurement in quantum systems.

Descartz2000
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Can someone explain how Hardy's Paradox is resolved? As well, what could someone infer from this regarding both Copenhagen Interpretation and Bohm's theory?
 
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Hardy's paradox is resolved by realizing that measurement CHANGES the properties of the system. In the Copenhagen interpretation the measurement creates the properties (which before the measurement do not even exist), while in Bohm's theory the properties are changed by instantaneous influences between distant particles.

For more details, see e.g. Secs 5.5 and 5.6 in
http://xxx.lanl.gov/abs/quant-ph/0609163 [Found.Phys.37:1563-1611,2007]
 

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