Electron wave function in quantum cascade laser?

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Discussion Overview

The discussion centers on the nature of electron wave functions in the context of quantum cascade lasers, particularly focusing on how these wave functions can be visualized without collapsing and whether they can be considered "real" waves. The scope includes theoretical implications and philosophical considerations regarding the interpretation of quantum mechanics.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions how images of electron wave functions can be obtained without the wave function collapsing, suggesting this may imply that wave functions are real waves.
  • Another participant requests additional details and references to better address the initial question regarding the images of wave functions.
  • A different viewpoint posits that the curves representing wave functions are typically the result of calculations, and that while individual measurements yield single position values, a large number of measurements can reconstruct the wave function.
  • One participant introduces the idea that if an inertial frame is chosen and classical measurement apparatus is defined, the wave function can be treated as real for practical purposes, though this is subject to disagreement on the choice of frame and classical components.

Areas of Agreement / Disagreement

Participants express differing views on the reality of wave functions and the implications of measurement in quantum mechanics. There is no consensus on whether wave functions can be considered real or merely calculative constructs.

Contextual Notes

The discussion highlights the philosophical implications of interpreting wave functions and the challenges in defining measurement frameworks within quantum mechanics. There are unresolved questions regarding the assumptions made about inertial frames and classical measurement apparatus.

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How are these pictures taken of the electron wave function without the wave function collapsing?
Does this mean that electron wave functions are real waves after all?
upload_2015-7-20_21-28-21.png

Wikipedia Quantum cascade laser will give you the discription
 
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I think you'll need to provide some more detail for us to be able to answer your question - do you have a reference for the paper that you took this image from?
 
Nav said:
Does this mean that electron wave functions are real waves after all?
"Real or not real" is philosophy.
Usually those curves are the results of calculations.
You can measure them by measuring many electrons. Each electron just gives a single position value (and you change its state with the measurement), but with enough measurements of different electrons you can reconstruct the wave function.
 
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If one decides on an inertial frame and decides which parts of the universe constitute the classical measurement apparatus, then one can treat the wave function as if it is real for all practical purposes.

Not everyone will agree on the choice of inertial frame nor which parts of the universe to consider classical, which is among the reasons the wave function may not be real.
 

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