Wave mechanics vs Statistical Mechanics

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Discussion Overview

The discussion centers on the relationship between wave mechanics and statistical mechanics, particularly focusing on the role of interference in statistical mechanics and whether it can be considered a wave phenomenon. Participants explore the conceptual overlap between waves and statistical ensembles, as well as the implications of Fourier analysis in this context.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Mathematical reasoning

Main Points Raised

  • Some participants question whether interference can occur in statistical mechanics, suggesting it is primarily a wave mechanics phenomenon.
  • Others argue that while interference may not be central to statistical mechanics, it is not accurate to say it cannot happen at all.
  • One participant reflects on their understanding of Fourier decomposition, noting that it allows for the representation of functions as sums of waves, which could imply a statistical interpretation.
  • Another participant shares a personal perspective on visualizing waves as statistical ensembles, particularly in relation to quantum mechanics and phenomena like Rogue Waves.
  • A suggestion is made to consult another participant, Bhobba, who has expertise in both quantum mechanics and statistical mechanics for further clarification.

Areas of Agreement / Disagreement

Participants express differing views on the role of interference in statistical mechanics, with no consensus reached on whether it can be considered a significant aspect of the field.

Contextual Notes

Participants acknowledge the complexity of the relationship between wave mechanics and statistical mechanics, with some noting that their understanding may depend on specific interpretations or contexts, such as quantum mechanics.

Jimster41
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Is it accurate to say that interference cannot happen in Statistical Mechanics? I know it is considered a wave mechanics phenomenon but aren't waves just highly statistical ensembles, like anything else?

I always thought that Fourier says periodic spectra could be summed to create any signal. As such any distribution is a sum of "waves", and vice versus.
 
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Interference doesn't play a role in Statistical Mechanics (at least as far as I remember, but if it does, it's not as central as in wave mechanics). To say it cannot happen is weird. Where does this question come from ?

And yes, Fourier decomposition is a change of basis that goes from one basis to describe a function to another. Both bases are complete and orthogonal.
 
Thanks. I don't think it is central to the thread below at all. It did confuse me though. I think I lean pretty heavily on the picture I have of the series-to-frequency dual, especially when trying to follow conversations about QM. I can picture a set of composite "waves" that are randomly different from each other except for one frequency component. I had this cartoon of the Rogue Wave phenomenon. It seemed totally legitimate to me to picture them as a set of statistical ensembles that "interfere" specifically. But maybe that is not a good way to remember it.

https://www.physicsforums.com/threads/basic-questions-about-decoherence.827771/#post-5200884
 
I see where it comes from. Ask Bhobba, he seems to be a lot better equipped than I am (did QM and Stat Mech but never had to worry about interference in the latter).
 

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