Casimir Effect - min. distance between plates

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    Casimir effect Plates
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Discussion Overview

The discussion revolves around the Casimir effect and the limitations of its calculations when considering the distance between two plates. Participants explore the implications of atomic scale interactions and the nature of the plates involved in the effect.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that the Casimir force increases as the distance between two plates decreases, but question where the limit lies.
  • One participant suggests that Casimir calculations become invalid when the distance is less than the size of an atom, while expressing suspicion that limitations may arise even earlier.
  • Another participant questions whether the Casimir effect can exist at distances less than the size of an atom, prompting a discussion about the nature of the plates at such scales.
  • Concerns are raised about the atomic-level characteristics of the plates, specifically the non-smooth edges, which complicate the definition of distance between them.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the limits of the Casimir effect or the implications of atomic scale interactions, indicating multiple competing views and unresolved questions.

Contextual Notes

Limitations include the dependence on definitions of distance at atomic scales and the unresolved nature of how the Casimir effect applies when considering the physical characteristics of the plates.

Dmitry67
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Casimir force increases when you put 2 plates closer and closer...
But where is a limit?
Obviously, Casimir calculations will not be valid when distance becomes less then a size of one atom.
But I suspect that all these calculations break apart much earlier.
Your thoughts?
 
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Dmitry67 said:
Casimir force increases when you put 2 plates closer and closer...
But where is a limit?
Obviously, Casimir calculations will not be valid when distance becomes less then a size of one atom.
But I suspect that all these calculations break apart much earlier.
Your thoughts?

Why you say "Casimir calculations will not be valid when distance becomes less then a size of one atom". Do you mean there won't be Casimir effect less than size of one atom.

Since casimir effect is based on virtual photons between the plates. I think there will no effect when the distance is <= wavelength of virtual photon.
 
spidey said:
Do you mean there won't be Casimir effect less than size of one atom.

But can we talk about the 'plates' in that case?
 
Dmitry67 said:
But can we talk about the 'plates' in that case?

I don't understand what you mean.can you elaborate?
 
Well, on the atomic level edges of each plate is not 'smooth'
So it is difficult to say about the distance
Where a plate 'begins'?
 

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