Is an atomic electron transition a phase transition?

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Discussion Overview

The discussion centers on whether atomic electron transitions can be classified as phase transitions, exploring the nature of these transitions at the atomic scale and their relation to quantum theory.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants assert that atomic electron transitions cannot be considered phase transitions because they occur on an atomic scale where the concept of 'phase' does not apply.
  • Others emphasize that quantum theory is fundamentally linear, arguing that the time evolution of quantum states is described by unitary transformations, which suggests that atomic electron transitions are not nonlinear changes.

Areas of Agreement / Disagreement

Participants generally agree that atomic electron transitions do not fit the definition of phase transitions, but there is some contention regarding the implications of quantum theory's linearity in this context.

Contextual Notes

Some statements rely on specific interpretations of quantum mechanics and the definitions of phase transitions, which may not be universally accepted.

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No. It takes place on an atomic scale where there is no concept of 'phase'.
 
BvU said:
No. It takes place on an atomic scale where there is no concept of 'phase'.
Thanks
 
BvU said:
No. It takes place on an atomic scale where there is no concept of 'phase'.
Is atomic electron transition a nonlinear change?
 
No, quantum theory is a linear theory, particularly the time evolution is described by unitary transformations (of state and observable operators).
 
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Moderator's note: Thread level changed to "I".
 
vanhees71 said:
No, quantum theory is a linear theory, particularly the time evolution is described by unitary transformations (of state and observable operators).
Thanks
 

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