PeterDonis's latest activity

How does that make it real?

The second doesn't look correct. It should be a multilinear function of sections of the tangent space, not the cotangent space. It's...

Physics is not about opinions. Different QM interpretations say different, and mutually inconsistent, things about what the wave...

Do you have a reference in the decoherence literature for this?

This is only true in certain interpretations. This is not correct. As noted above, your statement is not true in all interpretations...

It should be noted that in this formulation, the topology of the initial surface also has to be specified: it's ##R^3## for Minkowski...

Do you have a reference for this? Please bear in mind that personal theories and personal research are out of bounds for discussion here...

How? Superposition means that equations are linear. You can do both QM and QFT in non-inertial frames, it's just tedious and gives...

Yes, the spreading of single-atom wave packets has been observed experimentally and agrees with theory: In-situ Imaging of a Single-Atom...

You missed the point. I was not claiming that either Minkowski spacetime or Schwarzschild spacetime are realistic. They are just clear...

See the bolded addition in the quote above. Without it the statement is false. Again see the bolded addition. I think both additions...

Both Minkowski spacetime and Schwarzschild spacetime are vacuum spacetimes. They have the same energy-momentum but different boundary...

There can be two topologically different manifolds with the same metric everywhere, neither of which is incomplete in any way. A pure...

Where you said: You're misdescribing this. The maximal analytic extension tells us the maximal global manifold that has the same local...

Ok. No, the ball provides it. The spring pulls (or pushes) on the ball, and the ball pulls (or pushes) on the spring. These are...