Recent content by Ben Wilson

can you give an example of a non isotropic space?

Generally speaking, B would be faster, A would be more precise (lower energies). This is because your completing more calculations for the extra basis functions, but the density in A would be more realistic.

i linked you to david tongs qft course, he says ripple for a quick mental picture for the reader in the intro, this is an analogy. In the course he says excitation, because there's a consensus amongst physicists about what this means in a mathematical sense (see p 29). It doesn't matter what...

Where is there an analogy in post 24? Honestly, these questions aren't just to annoy. I have a problem with the wording you have used from a technical standpoint and i need to clarify what you mean with the terms that you are using. As others have said, the fields in qft are not a mental picture...

Also your understanding of force only works for constant accelerations. constant a and constant m: The force equation is F=ma, we could know the change in velocity Δv and the amount of time it took for that change to occur Δt. Then acceleration is a constant a=Δv/Δt. You could them formulate...

1. Particles are excitations of a field. 2. Electrons are excitations of the electron field. 3. These Excitations display themselves as physical phenomena that we can observe. 4. How can you move a single electron? 5. What observations do you mean? Also QFT is deeply layered, and doesn't...

This part is incorrect, which is why you get stuck at the next part.

Buy a laser where they tell you the frequency on the box. I think the calculations you want to do are very complex. But there may be simpler method that I've missed.

you say to move the magnet we must move the field. Now you have to distinguish between em(magnetic) field or electron field.

Just focusing on the one important particle for magnetic fields out of those, electrons are excitations of an electric field. Interacting electrons exchange photons between each other and even themselves because the dynamics of the electron field is coupled with the electromagnetic field in a...

what particles are your magnets made of? If you pick somethin then i can explain the qft behind it and answer your question

It means a position or a vector is expressed as a set of n real numbers. For n=3, position is x=(x,y,z) the vector field may be p=(px,py,pz).

easier to measure it by observing the color of the laser light. Or more quantitatively, measuring the distance between fringes in an interference pattern

I'm asking you what particles the 'magnet', e.g. an iron bar magnet, is made of? its electrons, which are not excitations of the magnetic field, but they do 'cause' the magnetic field in some physical sense.

I do not mean sloppy thinking, just a sloppy description in an academic sense, i.e. not very pedantic or precise. I'm saying that when these things are more clear and defined, the chicken and egg problem goes away in my view.