Can someone explain why momentum does not commute with potential?

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SUMMARY

The discussion centers on the non-commutative nature of momentum and potential energy in quantum mechanics. Participants clarify that potential energy is defined as a function of position, which directly influences the momentum operator. This relationship highlights the fundamental principles of quantum mechanics, where the order of operations affects outcomes, specifically in the context of potential energy and momentum.

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  • Understanding of quantum mechanics principles
  • Familiarity with the concept of momentum in physics
  • Knowledge of potential energy as a function of position
  • Basic grasp of operator theory in quantum mechanics
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  • Study the mathematical formulation of momentum operators in quantum mechanics
  • Explore the implications of non-commuting operators in quantum theory
  • Investigate potential energy functions and their role in quantum systems
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Students and professionals in physics, particularly those focusing on quantum mechanics, as well as educators seeking to explain the relationship between momentum and potential energy.

coolpoke0908
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So I only have a vague understanding of what commutators represent. I understand the example between momentum and position, but I don't understand why you cannot know the potential and the momentum of a particle at the same time.
My assumption is that knowing potential can lead to knowing the position, but I don't know how this can be.
 
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If by "potential" you mean "potential energy as a function of position", there is a clue right there.
 
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Vanadium 50 said:
If by "potential" you mean "potential energy as a function of position", there is a clue right there.
Oh! Okay that makes sense! Thank you!
 

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