Hello Mathematicalphysicist. In the book "Introduction to Superfluidity" by Andreas Schmitt, it was mentioned that U(1) was the simplest symmetry, which means there are other symmetries too. ( in my opinion)...
Thank you, MathematicalPhysicist.
Another example : https://arxiv.org/pdf/1206.3906.pdf This article talks about global u(1) symmetry in superfluid neutron stars. It says that the goldstone mode for that symmetry breaking is a phonon. I was asking for other symmetries that exist in...
Yes. I can add more information. For example, I've read that in superfluids there is a global U(1) symmetry. I was asking if there are other symmetries as well. :)
c² = (n/m) ∂²U/∂n²
where
U = vacuum energy density as a function of the quasiparticle density
n = quasiparticle number density
m = bare mass of quasiparticle
Is there a book, article where this formula is explained?
Thank you.
I am reading "Introduction to superfluidity" by Andreas Schmitt. He mentions the global symmetry U(1). What other symmetries are there in superfluids?
Thank you.
Peter, you meantioned quantum numbers. https://en.wikipedia.org/wiki/Quantum_number May I ask if there are more quantum numbers than stated in this article? Even hypothetical ones.
"Note that the article says the charge operators correspond to simple roots, not the charge quantum numbers."
Ah, i thought they used "charge operator" and "charge" as synonyms. Thanks for engaging with me.
Thanks for replying to me, Peter. I get that it is complicated, but is there any way of explaining it a bit simplified? At least what they mean by "correspond to".