Can Wave Function Constants Be Both Positive and Negative?

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SUMMARY

The constants for wave functions in quantum mechanics can indeed be both positive and negative, as they are subject to an overall phase factor represented by ##e^{i \phi}##, which does not affect the physical state. This means that multiplying the constant by ##-1## does not alter the observable physics, and the convention of using a positive real constant is primarily a matter of preference. Additionally, the requirement for wave functions, specifically Ψ(x,y,z), to be square arises from foundational principles in quantum mechanics, including non-contextuality and Gleason's Theorem.

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  • Understanding of quantum mechanics principles
  • Familiarity with wave functions and their properties
  • Knowledge of complex numbers and phase factors
  • Basic grasp of Gleason's Theorem
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  • Study the implications of phase factors in quantum mechanics
  • Explore the mathematical foundations of wave functions
  • Research Gleason's Theorem and its applications in quantum theory
  • Learn about non-contextuality in quantum mechanics
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Students of physics, particularly those beginning their studies in quantum mechanics, as well as educators and researchers interested in the foundational aspects of wave functions and their interpretations.

terp.asessed
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I am curious if the constants for wave functions for a particle in a box can be both +/-...because constants I've applied for wave functions have always been +...
 
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Wave functions that differ only by an overall phase factor ##e^{i \phi}## represent the same physical state, as no observable changes due to this complex phase. Hence, multiplying the constant by ##-1## will not change the physics. Taking the constant to be real and positive is often simply a matter of convention.
 
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Thank you for the explanation!
 
Hi guys,

Just started studying physics hence I obviously have a silly question for you.

Why the wave function Ψ (x,y,z) must be square. It seems wave functions themselves have no meaning if they don't have a physical meaning.

Thanks a lot in advance,
Rodos
 
Thanks Bill. I will check it out.
 

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