Position Eigenstates Indeterminacy

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SUMMARY

The discussion centers on the indeterminacy of position eigenstates and its implications for distinguishing classical states from quantum states. It specifically addresses the concept of smearing, suggesting that a particle smeared by 10 Planck lengths may still be considered classical. The conversation highlights the limitations of current measurement devices in probing such small scales, emphasizing that values like 10, 100, or even 1000 Planck lengths are beyond our current measurement capabilities. The Heisenberg uncertainty principle is referenced as a mathematical framework for understanding these measurements.

PREREQUISITES
  • Understanding of quantum mechanics principles, particularly position eigenstates
  • Familiarity with Planck length as a unit of measurement
  • Knowledge of the Heisenberg uncertainty principle
  • Basic grasp of classical versus quantum state distinctions
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  • Research the implications of the Heisenberg uncertainty principle on quantum measurements
  • Explore the concept of Planck length and its significance in quantum physics
  • Investigate current measurement technologies capable of probing quantum states
  • Study the mathematical definitions of position eigenstates in quantum mechanics
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Edward Wij
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How large could position eigenstates indeterminacy be so as to be indistinguishable from classical state? For example. If a particle is smeared by 10 Planck length.. could we tell or could we consider it as classical state? What is the most accurate device that has probe the smallest region enough to say the smearing can be such and such length like 5 Planck length that we can still call classical state (assuming supposed there was no collapse and born rule not applied to the decoherence mixture of basis)?
 
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I can't even read your last question clarified in quotes. However, the actual values of 10 Planck lengths or even 100 or 1000 (or even a Million) times 10 Planck lengths are so small as to be beyond our measurement NOW. We define this measurement, mathematically. Actually measuring this value is another matter.

Perhaps you should look into the Heisenberg uncertainty equations for an answer to your question.
 

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