All Questions
11
questions
3
votes
0
answers
44
views
Multiple excitations of composite bosons?
Fundamental bosons, which are the mediators of the Standard Model interactions, are permitted to have multiple excitations with the same quantum number. Fermions, on the other hand, obey the Pauli ...
- 2,921
-1
votes
1
answer
74
views
Mechanistic Explanations for Electron Degeneracy Pressure [closed]
Most explanations of electron (or any fermion) degeneracy pressure cite Pauli's exclusion principle for fermions. I believe such explanations tell us why we should believe such phenomena exist, but ...
- 1,073
4
votes
1
answer
337
views
Pauli Exclusion Princple for a fermion and antifermion
I understand that the Pauli Exclusion Principle applies only for identical particles, so that a fermion and an anti-fermion should be allowed to be in the same state. However, when I look at the ...
- 167
7
votes
3
answers
961
views
Does the Pauli exclusion principle apply to one fermion and one antifermion?
I understand that two fermions cannot simultaneously have the same <momentum, spin> state. I know this is also true of two anti-fermions. But is it possible for one fermion and one anti-fermion ...
- 167
0
votes
1
answer
89
views
Virtual fermions vs exclusion principle
How QED eliminates the cases when
in loop corrections two fermions get created with the same momenta and spin state?
Is it done by the ladder operators?
Edit: the two fermions are in two distinct ...
- 324
2
votes
2
answers
242
views
How does the repulsion due to equal spin fermions show up mathematically?
I expect that in many-body problems of electrons, spin should cause same-spin-electrons to repel more strongly than opposite spin electrons because the Pauli exclusion principle is the observation ...
- 1,356
1
vote
3
answers
162
views
Bound on fermions in a finite volume?
The Pauli Exclusion Principle says that two or more identical fermions cannot occupy the same quantum state within a quantum system simultaneously. However, I'm wondering if we could potentially pack ...
- 249
4
votes
1
answer
790
views
Fields: Bosons vs Fermions
Reading Student Friendly Quantum Field Theory by Robert Klauber and he made me realize I've taken as fact for some time that bosons are the "force carriers" in QFT, without really understanding fully ...
- 517
11
votes
1
answer
7k
views
Why must fermions be antisymmetric? [closed]
I have read that fermions cannot exist in the same state simultaneously. I understand why indistinguishable particles with an antisymmetric superposition of states can't exist in the same state ...
- 1,386
4
votes
0
answers
94
views
Can Pauli exclusion be described locally?
Is it possible, in principle, to define the exclusion principle in a "local" sense, as a property of the tangent space at a point, or a single fiber of a spin bundle? Or does it necessitate a global ...
- 41
7
votes
1
answer
289
views
Are composite bosons always bosonic (e.g. the pion-cloud surrounding the nuclei)?
The $\pi$-meson is a boson, but consists of quark-antiquark (fermions). It seems to me that at some energy level (equivalently distance) the inner structure (fermionic nature of the quarks) of the ...
- 5,569