PeterDonis's latest activity

This is going to be difficult if not impossible. You really need to be looking at textbooks or peer-reviewed papers. Particularly for a...

It's rubbish, in short. That's why it doesn't make sense. This is analogous to saying that a hill is steep because the contour lines on...

I'm not sure that's the actual mainstream position. AFAIK the actual mainstream position is the one I stated earlier, that the EP is...

You don't need to "master" relativity. You just need to understand that one of the lessons relativity teaches us is that physics is...

The fact that these papers claim to be testing "the equivalence principle on cosmological scales" doesn't mean the concept actually...

That's correct. What you are calling "ordinary" QM is a non-relativistic approximation. For relativistically correct QM, you need...

Unfortunately, no. Various patent medicines have been offered in the literature on QM interpretations, but none of them are actual...

Not the values of coordinate time ##t##--the values of proper time at that coordinate time ##t## that have elapsed for a comoving...

Of course, because the temperature ratio has to be equal to the ratio of scale factors, and the ratio of scale factors is the ratio by...

No, it's what you should expect of any cosmological model that makes it to the stage of getting published in a peer-reviewed journal. It...

I already answered this in post #2: that expansion factor is an observational fact, which all models must account for. So obviously it's...

That immediately makes me question the validity of the paper. The whole point of the equivalence principle, in each of its forms (weak...

That's not how the proper frame of reference of an accelerated observer is defined in any of the references that have been given. The...

I'm not sure what you mean by "a coincidence". The model under discussion is a speculative model. As far as I can tell, the equivalence...

Sort of. It is a limiting case that is not actually part of the spacetime. Saying that "time was equal to zero" at that limiting case is...