I was wondering something, a collection of fermions can resist compressing forces due to what is termed degeneracy pressure. I was wondering, which of the four fundamental interactions is this due to? Thanks.
I understand that it's due to Pauli's exclusion principle. But how does that fit in with the Standard Model, where all forces can be classified as due to one of the four fundamental interactions? I mean, if a star is resisting a compressive force, that means an opposite force is acting. To which interaction can we attribute that force?as gendou2 said it's to do with Pauli exclusion, since
when a material is compressed (such as the interior of a star under the effect of gravity) the uncertainty in x gets smaller, leading to less uncertainty in momentum. The fermions are called degenerate when the pressure due to this momentum equals or exceeds(?) the pressure due to the fermions thermal motion. So in a sense it's due to whatever of the fundamental forces is causing the compression, mainly gravity in a stellar core - which is what this problem is usually used for I think, although I'm sure it must be quite important in studying fusion.
The actual pressure is due to the usual forces of the Standard Model (In actuality, it will be mostly the electromagnetic force). If you put the fermions in a container at near zero temperature and you compress the container, the actual pressure exerted by the fermions on the box is simply the electromagnetic force between the fermions and the particles in the box. The reason resist compression is the degeneracy pressure but the actual force they exter on the container is electromagnetic (electric for the most part).I was wondering something, a collection of fermions can resist compressing forces due to what is termed degeneracy pressure. I was wondering, which of the four fundamental interactions is this due to? Thanks.