PeterDonis's latest activity

Yes, when @jbriggs444 said "nothing is moving", he was (implicitly) using a comoving coordinate system. That's the most common...

Not really no. The viewpoint that "nothing is moving through space, but space itself is expanding", and the viewpoint that "objects are...

You can't make this statement without specifying a coordinate chart. There is no such thing as "moving" or "not moving" in any absolute...

From what I can see, the article (and its first part--what you linked to is the second part) talks about QBism and consistent histories...

Note, though, that factorizability is how we would intuitively express the cluster decomposition principle. So this doesn't really help...

It's not just that we have no direct experience with the quantum world. It's that we do have tons of direct experience of a world that...

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The set of comoving objects. Comoving objects are objects that see the universe as homogeneous and isotropic (the same everywhere and in...

Unfortunately that's not possible. In classical physics, position and momentum each have their own independent configuration spaces...

As @Nugatory said, we have reports on this user and the moderators are taking appropriate action. For future reference, @sandy stone...

Michelson interferometers, Mach-Zehnder interferometers (and also the double slit) measure field correlations. The quantity you measure...

Correct. Both of them are interferometers, yes. What gets observed at any detector depends on the relative amplitude and phase of the...

Both of them have one source, which gets split by a beam splitter into two beams. Just as I described in post #4.

No, but it was part of the specific scenario we were discussing as I understood it. Yes, that's correct. See my discussion with...

In the general sense of "stress", which in relativity means "the components of the stress-energy tensor", yes, I agree. I should have...