And also https://profmattstrassler.com/articles-and-posts/particle-ph...
“A virtual particle is not a particle at all. It refers precisely to a disturbance in a field that is not a particle.”
“A virtual particle is not a particle at all. It refers precisely to a disturbance in a field that is not a particle.”
Not sure how they even apply in the case where Feynman diagrams aren't applicable. Hell, the calculations likely use lattice QCD which eschews them entirely!
On the contrary, this means that there are too many virtual particles (gluons) being exchanged inside a proton, so many that perturbation theory is not applicable.
No doubt, and Casimir is probably sufficient evidence, but it seems to me a lot of confusion would be saved if we changed the name.
To what I don't know - perhaps something like say quantum energy disturbance but more eloquent or descriptive.
Basically, it's like a playing around virtual machine on a physical PC.
I assume that means those "virtual particles" behave almost like actual particles. e.g. have a rest mass or not.
This helps lay person understand physics better.