A small attractive force that acts between two close parallel uncharged conducting plates, resulting from the quantum fluctuations of the field.
Questions tagged [casimir-effect]
188 questions
10
votes
3 answers
Can 'negative energy' be created by the Casimir Effect?
In several papers about Time machines I have read that the Casimir effect can be used to create negative energy, so the Alcubierre-device or wormholes could be produced.
How can negative energy be created?
Jose Javier Garcia
- 4,719
6
votes
1 answer
Repulsive Casimir force between two plates
In the literature, Casimir force has been explained using mode summation method, where missing of modes between metal plates give rise to attractive force, how we explain the repulsion using these idea. Some will argue that different boundary…
Phyreak
- 113
4
votes
1 answer
Why does the Casimir effect require metallic plates?
The typical example of the Casimir effect is of two uncharged metallic plates in a vacuum, placed a few micrometers apart.
Why do the plates need to be metallic?
draks ...
- 982
3
votes
0 answers
Casimir effect with super conductors
Do the plates in the Casimir effect need to be metal? What if one uses super conductors? Is there any difference theoretically/experimentally?
Physics_maths
- 5,559
1
vote
0 answers
What determines if the casimir effect pushes or pulls
I've read an article where chinese researchers have made a mechanism that uses the casimir effect to push two things apart but i'm confused by this cause i've only ever heard of the casimir effect pulling things together why in this case does it…
1
vote
0 answers
Using the same variable to compute the zero-point energy difference of Casimir Effect
I am reading the original work of Casimir: On the attraction between two perfectly conducting plates (1948)
In general, the zero-point energy is
$$U_0 =\frac12 \hbar c \sum_{k_x=0}^{\infty} \sum_{k_y=0}^{\infty} \sum_{k_z=0}^{\infty} \sqrt{k_x^2 +…
Alejandro G
- 11
1
vote
2 answers
Does Matter Expel the Quantum Vacuum?
The Casimir effect is demonstrated by measuring forces between two bodies, the first being between very narrowly spaced parallel plates. A net force occurs that is attributable to the properties of the quantum vacuum. Does this mean that the space…
Incredible II
- 368
1
vote
0 answers
Are there Casimir effect at the tip of a toy top to the ground?
I am not a physic major rather a enthusiast and wanted to ask about the casimir effect between the tip of a top to the ground, after watching a guy spinning a top in the TV?
Certainly there may not be any such effect between a top and the…
jomegaA
- 111
1
vote
1 answer
Is it possible to produce Fermions from the dynamical Casimir effect?
As I understand it, the dynamical Casimir effect has been demonstrated in the laboratory and has been found to allow the emission of photons from the vacuum. Given the right frequency of the oscillating mirror, and the right energy supplied to the…
sakurashinken
- 609
0
votes
2 answers
Casimir effect plate experiment
i was a little confused about the casimir effect. my understanding is with the 2 plate experiment there was a force pushing the plates together because there were less virtual particles in between the plates than outside them. Why are there less…
Dabombdiggity
- 41
- 1
- 2