New answers tagged fermions
8
votes
Physical meaning of symmetric and antisymmetric wavefunction
Firstly, the question refers to the symmetry about particle exchange - the title is confusing, since there are many other important symmetries, starting with $\psi(\pm x)=\pm \psi(x)$, which has to do ...
- 60.3k
1
vote
Physical meaning of symmetric and antisymmetric wavefunction
First of all, states of indistinguishable particles have to be either symmetric or antisymmetric with respect to a permutation $P$ of two particles, which is a parity operation $P^2 = \mathbb{I}$. If ...
- 101
-3
votes
Does black hole formation contradict the Pauli exclusion principle?
In actuality, there is no such thing as this so called singularity...
It's a convenient mathematical invention to represent something of which we understand very little.
Although quantum physics can ...
- 3
2
votes
Accepted
$p+ip$ pairing in a spinless fermion system with attractive interaction
A spinless fermion system with attractive interactions supports p+ip
pairing.
In a spinless fermion system, there is no spin degree of freedom, which means the pairing must occur purely in the ...
- 187
0
votes
What happens to the fermion spin when I move around it in a full circle
My confusion arised from the fact that the phase of the state gets a minus sign, not thr expectations value of the spin.
Trivial, but I must throw some of the responsibility on people that visualising ...
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3
votes
$2\pi$-rotation of fermionic states vs. fermionic operators
The point is that fermionic operators are not observables for many reasons. For instance they do not commute for causally separated arguments. You need two (an even number of) fermionic operators ...
- 73.8k
0
votes
Can Bose-Einstein condensates and Fermionic condensates survive for long periods of time in space?
Fermions do not form a condensate, since they can not accumulate in one quantum state. Sometimes people call pairs of fermions condensed, such as in superconducting materials, but I assume that this ...
- 628
0
votes
Fermi energy at zero temprature
[...] in which form is the Fermi energy stored in the electrons? If it its in form of translational kinetic energy, then wouldn't those electrons strike the beaker at high speeds and increase the ...
- 60.3k
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