Recent content by Martian2020

Renormalization talk by Sean Carroll, "but then I could construct from that the following diagram with four lines in it": In previous talks he explained about diagrams and told interaction can be represented by many (even infinite) number of diagrams, "in" line can be changed to antiparticle...

This seems like useful explanation. Could you please clarify: 1) at what density (start from 0 and increase) distribution becomes so "Maxwell like" that density starts to increase downward? 2) explain in more detail mechanism of the process highlighted in bold?

Because they gain speed in a gravitational field toward the ground that could be result I want to understand from analyzing individual particles. P.S. interestingly I see you formulas as formulas in a quote above, but in original post I see ordinary symbols bracketed with ##... The two above...

More. You hint that energy levels of particles are generally different. Properties_to_Kinetic_Theory_of_Gase "When examining the gas molecules individually, we see that not all of the molecules of a particular gas at a given temperature move at exactly the same speed. This means that each...

As per Sean, textbooks contain Copenhagen interpretation only, wave function collapse. Do you confirm that? If yes, where do I learn other quantum theories?

Elementary particles (if not entangled) are wave functions in Hilbert space. At least Sean said so (I've understood that way). Google finds lots of links for "quantum wave function for photon". Why do you say the opposite?

Kind of yes. But isn't electromagnetic wave a measurement result of a wave function? We cannot observe electromagnetic wave w/out making observation of a photon as far as I understand.

Could not find reason on molecular level. E.g. here some explanation "There are two reasons: at higher altitudes, there is less air pushing down from above, and gravity is weaker farther from Earth's center." However, when I start to imagine particles, when there are only a few I get opposite...

Why is that? Why can't we think/imagine such frame?

The question arose when watching Sean Carroll video: The Biggest Ideas in the Universe _ Q&A 6 - Spacetime 3:50 - 13:30 Because photons follow null geodesic in spacetime the question arose from viewers: "photons do they really experience no time this is a question" And in the answer: "but if...

On a second thought I see your point, looks like there is no way to check that "simultaneity" in experiments. The results would just match...

As I understood whole idea of action at a distance is that it happens faster than light and it "bothered" Einstein. From that point of view I see simultaneity is at heart of the issue and therefore frame of reference matters. I tried to read about experiments, but I did not find into about...

Maybe my question is naive and due to my not deep enough knowledge of particle physics. I imagine we entangle two particles on Earth and then send one on spaceship going from Earth - two coordinate frames moving in relation to one another. Moments of simultaneity are different for them. When...

Thank you. I think I'm understanding better now. Could you please clarify: invariants are e.g. causal relationships, that is clear. Are paths that a hypothetical flash of light would follow through spacetime invariants (I say paths, because light can go many directions, correct?)?

I'm not sure why @PeroK liked this post. It is correct, as far as I can see for Minkowski. But in my post before I tried to expain I wanted to do what he said: I want to confront spacetime w/out coordinates, as @PeroK challenged me to do. Please help me to, if you can, explain your point w/out...