Roberto Pavani's latest activity

If there are all possibile outcome universes then there are some where born rule doesn't hold. The question is then: how come in our...

MWI has no satisfactory answer for the Born rule, except where the branching is equally likely. That's why almost all presentations of...

A naive concern about MWI: it implies the existence of branches where 1000 photons all pass through a 45° polarizer. In that branch...

As far as their claims about "what is really happening", yes. Of course they all make the same predictions for what we can test by...

Maybe it is quantum mechanics that collapses.

If the "second derivative is (just) enough to detect it" then it means you are measuring curvature. :) The geodesic deviation equation...

This is tidal gravity. It is curved spacetime, not flat. It is physical gravitation and cannot be removed by a change of reference...

Yes, "large enough" to "feel different gravity". But the second derivative is just enough to detect it.

A naive question: if the equivalence principle tells us that spacetime is locally flat, and in flat spacetime Newton's third law holds...

The problem is that there is no single mathematical object that is referred to by "its four-momentum". Physicists, with their usual...

They're not part of any state. They're part of the mathematical description of the field--more precisely, they are properties of the...

I see. But then it mostly boils down to how one wants to interpret the word "intrinsic" (including connotations) and how one wants to...

You're right that the 4-momentum is covariant. But its only frame-invariant content is the norm ##p_\mu p^\mu = -m^2##, which is just...

I don't think that intrinsic and extrinsic are the right words for what you are trying to say. Perhaps better words are invariant and...

@Demystifier nailed it. Perhaps the simplest way to see why: energy and momentum are frame-dependent, so they can't be intrinsic to the...