B Spin and polarizations in momentum space

[Azurite]

In the phrase "configuration space", the word "space" is being used in the mathematical sense (a set with some added mathematical structure) and there is nothing outmoded about it.

But it's still related to our space. As Peterdonis puts it: "It depends. For the non-relativistic case of $N$ particles, if space (not spacetime, since we're non-relativistic) has $D$ dimensions, then the configuration space of the quantum system has $N * D$ dimensions.

So why is our configuration space still using the concept of Newtonian space?

 

[PeterDonis]

why is our configuration space still using the concept of Newtonian space?

I specifically said "for the non-relativistic case". Which, as I also said in an earlier post, is only an approximation, just as Newtonian physics is only an approximation to relativity.

At this point I am closing the thread since your substantive questions have been answered and the discussion is degenerating into quibbles over language.