Can diffraction be explained by quantisation?

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SUMMARY

The discussion centers on the relationship between diffraction patterns through a single slit and the quantization of momentum, particularly in the context of quantum mechanics (QM). Participants clarify that while momentum is altered during observation due to the Heisenberg Uncertainty Principle (HUP), it is conserved on average. The conversation emphasizes that the diffraction pattern results from the uncertainty in momentum introduced by the confinement of particles within the slit, rather than quantization in the traditional sense. Key references include the uncertainty relations and the implications of Ehrenfest's theorem in understanding momentum conservation in quantum systems.

PREREQUISITES
  • Understanding of quantum mechanics principles, particularly the Heisenberg Uncertainty Principle (HUP).
  • Familiarity with momentum conservation and Ehrenfest's theorem.
  • Basic knowledge of diffraction and wave-particle duality.
  • Ability to interpret Fourier transforms in the context of wave functions.
NEXT STEPS
  • Study the implications of the Heisenberg Uncertainty Principle in quantum mechanics.
  • Learn about Ehrenfest's theorem and its applications in quantum systems.
  • Explore the mathematical foundations of diffraction patterns, including Fourier transforms.
  • Investigate advanced treatments of diffraction in classical electromagnetism, such as those presented by A. Sommerfeld.
USEFUL FOR

Students and professionals in physics, particularly those focused on quantum mechanics, optics, and wave phenomena. This discussion is beneficial for anyone seeking to deepen their understanding of the interplay between momentum, observation, and diffraction patterns.

  • #31
Jilang said:
I was wondering if the diffraction pattern through a single slit

The full answer is quite advanced but isn't along the of the slit quantizing the wave function etc. The paper I linked does not tell the full story but sometimes physics is like that - the answer depends on your level of sophistication.

Thanks
Bill
 

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