Zero-point energy - a question for you all.

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Discussion Overview

The discussion revolves around Zero-Point Energy (ZPE) and its relationship with the Casimir Effect, particularly focusing on the conditions under which the effect occurs, the nature of the energy produced, and the implications of the distance between metal plates used in experiments. Participants explore theoretical aspects, practical implications, and the underlying physics concepts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • Some participants note that the plates in the Casimir Effect experiments are typically around a tenth of a millimeter apart, which influences the wavelengths that can exist between them.
  • One participant questions how the concept of energy is defined in the context of the force between the plates, suggesting that force may imply energy.
  • Another participant emphasizes that the Casimir Effect generates a force rather than an energy output, arguing that energy is not produced in the experiment.
  • There is a discussion about the quantum harmonic oscillator and its connection to ZPE and the Casimir Effect, with requests for clarification on this relationship.
  • Some participants express skepticism about the practical application of the Casimir Effect for energy generation, highlighting challenges in scaling the effect.
  • Participants provide a formula for calculating the force between the plates, indicating that the energy produced is very small and dependent on the distance between the plates.
  • One participant critiques the use of the term "background radiation" in relation to the Casimir Effect, asserting that it is not accurate.
  • There are references to the Heisenberg uncertainty principle and its implications for energy in quantum systems, with some participants discussing the nature of electromagnetic radiation and its quantization.

Areas of Agreement / Disagreement

Participants express differing views on the nature of energy and force in the context of the Casimir Effect, with no consensus reached on whether the effect can be harnessed for energy generation. The relationship between ZPE and the Casimir Effect is also debated, with some participants questioning the relevance of certain explanations.

Contextual Notes

Participants highlight limitations in understanding the practical implications of the Casimir Effect, including the small scale of the effect and the challenges in applying it to larger systems. There are also unresolved questions regarding the definitions and relationships between energy, force, and the quantum harmonic oscillator.

Who May Find This Useful

This discussion may be of interest to those studying quantum physics, particularly in relation to Zero-Point Energy, the Casimir Effect, and the underlying principles of electromagnetic radiation and quantum mechanics.

  • #61
Chronos said:
That would be a good one to keep in mind the next time you design a free energy machine. The Casimir effect is a local effect. You can unbalance any force locally. The net energy of the global system is, however, unchanged.
Isn't it an old argument about if our Universe is open or closed?
If the Universe is open, then the net energy of what we consider the global system could very well be subject to change.
Although perhaps not for the actual global.

It seems that is what Hawking's new work is about anyway.
An attempt to close the global system.
 
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  • #62
Hi,

I have heard the Casimir effect explained as an effect of an unbalanced zero point quantum fluctuation pressure on the plates. Since some frequencies of zero point energy would be excluded from between the plates, the pressure on the outside would be greater.

Lately I have read of an explanation of unbalanced electrostatic forces created by the charge matrix of the plates. Since the Casimir effect only works for conductors, some sort of EM force might be involved.

juju
 
  • #63
juju said:
Since the Casimir effect only works for conductors, some sort of EM force might be involved

You're very right! What do you think these 'zero point quantum fluctuations' are?
 
  • #64
da_willem said:
You're very right! What do you think these 'zero point quantum fluctuations' are?

I have read more than one explanation of Zero point energy. One explanation is that they are electromagnetic in nature. Another is that the are energy/momentum fluctuations in a sort of GR sense. I don't think anyone know for sure.

juju
 

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