4 ms·
You're looking for the concept of a degeneracy pressure, specifically neutron and quark degeneracy pressures. The short version is that the Pauli exclusion prin
by itishappy 2y ago
You're looking for the concept of a degeneracy pressure, specifically neutron and quark degeneracy pressures. The short version is that the Pauli exclusion principle forbids fermions from occupying the same state, and this manifests as an actual physical force that resists attempts to bring them close together.
https://en.wikipedia.org/wiki/Degenerate_matter https://en.wikipedia.org/wiki/Degenerate_matter
- ndsipa_pomu 2y agoThanks. It would appear that quark degeneracy pressure is the missing bit that I didn't know about and I don't really understand how that works, but then it does appear to be poorly understood in general.
- archgoon 2y ago> short version is that the Pauli exclusion principle forbids fermions I'd like to point out (for others following along) that the Pauli exclusion principle isn't actually a separate rule (That is, something you'd have to apply after you do 'normal' physics). What is happening with the PEP is that if you start off with a wavefunction that has fermionic symmetry (that is, interchange of two particle swaps the sign of the wavefunction), the evolution via the Schroedinger equation will preserve that (much like it preserves the Integral(|psi|^2)=1 relation). Same for bosons. So if you're writing a Quantum physics simulator, you don't need to put in a "Pauli Exclusion Rule" step.[1] [1] Though depending on your representation you may toss one in for numerical stability.