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In the case of quantum mechanics, we can think of $SU(2)$'s 2-dimensional representation, which describes spin-1/2 space. This allows us to understand the spin state the pair of spin-1/2...
Asked on 05/28/2021 by Quantization
1 answerI came across this document and would like to verify that I understand it correctly: My understanding is that only an electron with a negative electron spin...
Asked on 05/28/2021 by bblohowiak
1 answerI have a really naive question that I didn't manage to explain to myself. If I consider SUSY theory without R-parity conservation there exist an operator that mediates proton decay....
Asked on 05/28/2021 by d8586
1 answerIn the following expression, n and m belong to the number basis and x is the position: $$langle n|m rangle = int_x n^*(x) m(x) dx = int_x langle...
Asked on 05/28/2021
1 answerI was reading P. Vogel and J.F. Beacom, Phys. Rev. D 60, 5 (1999). I was trying to follow to use eq.(18) and eq.(19) to derive eq.(20) to no avail....
Asked on 05/28/2021
0 answerWe know that an electric dipole (having no net charge) produces electric field around it, which means net charge is not a compulsory condition to make electric field.Now if...
Asked on 05/28/2021
2 answerAlthough there have been a couple of questions on fermionic coherent states, I don't think any has answered the question "on what space do fermionic coherent states live?", or at...
Asked on 05/28/2021
1 answerI understand that each mode has its own wavefunction. I would like to know, how do I calculate the wavefunction of a quantum field? Should I multiply or sum the...
Asked on 05/28/2021
2 answerA molecule can rotate in three-dimensional space. Can a single proton spin? Are there smaller units of matter that can rotate?...
Asked on 05/28/2021
2 answerHow can I formally show (or at least argue) that, given the crystal Hamiltonian expansion around a Weyl node in a three-dimensional Brillouin Zone located at $vec{k}_{0}$, $hat{H}=f_{0}(vec{k}_{0})mathbb{I}+vec{v}_{0}cdotvec{q}mathbb{I}+sum_{a=x,y,z}vec{v}_{a}cdotvec{q}sigma^{a}$...
Asked on 05/27/2021
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