Recent content by zonde

In astrophysics Fermi Dirac distribution is applied to volume element. I guess this works for conduction electrons in metals as potential is quite homogeneous across metal. This seems strange for particles in bowl like potential as they should spatially redistribute according to energy levels -...

I would say that the answer is bound to be highly subjective for such a general question. I guess for me it's more interesting to ponder how randomness could emerge from extremely deterministic deeper reality as an interplay between interactions that strongly depend on distance and entanglement...

Can degenerate particles scatter from each other? To me it seems obvious that they can't but I want to be sure because I have seen people sort of imply the opposite. My reasoning is that after scattering participating particles have to end up in different quantum states and if participating...

I believe randomness is emergent property of determinism. Entanglement works by different rules than other interactions so in combination the they produce unpredictable events while at global level everything is still balanced. No

As I see Newtonian gravitational potential is an input in determining mass-energy arrangement inside gravitating body and it fits right in with other fundamental forces. I am sort of skeptical that GR has something to substitute for gravitational potential. Probably that's why I express it as an...

As I understand it's Newtonian gravity rewritten in terms of GR approach. It does not seem relevant for the questions I am trying to ask. But I could be wrong of course.

Imagine such material model: There are bunch of neutrons bound by gravity. These neutrons are degenerate meaning all gravitational binding energy has been removed from the system and they occupy lowest possible energy states allowed by Pauli exclusion principle. Will they arrange themselves...

Nice article. But you just plug in parameters for stress-energy tensor. The point is that parameters for stress-energy tensor are input for GR not output. Yes. So what about strong field? With what do you replace Newtonian gravitational potential in strong field regime? Yes, Newtonian physics...

Can we use GR to model real world gravitating objects without any reference to Newtonian gravity? There are a lot of interactions between massive particles involving exchange of energy. In Newtonian gravity we have gravitational potential which fits into the framework of classical physics quite...

Fair. Let me correct myself. When value of ##e^{i\phi}## is i or -i observed statistics will be identical to classical product state as interference between ##H_aH_b## and ##V_aV_b## polarization modes will disappear (given analyzers are measuring linear polarization).

I went over the paper. It seems the relevant statement is in one of the sources of the paper: https://arxiv.org/abs/quant-ph/9810003 This statement that phase shift can be adjusted in one of the output beams indirectly indicates that there can't be locally observable changes as otherwise it...

Oh, but look at the paper. ϕ represents tilt of a quartz plate in pump beam that does not lead to any locally observable changes in either of the two arms of the experiment. While changes in other terms in contrast lead to observable consequences in local statistics.

Speaking about entanglement I find it helpful to look at experiments. In particular I like this one, even so it's far from more sophisticated experiments that are using state of the art equipment. That's because it goes into more basic details about entanglement experiment...

Well, the answer is of course correct but it leaves out important part: how comes that evolution of the wave function is not influenced? Because interaction of say silver atom with SG apparatus at arbitrary angle can not be predetermined from atom's trajectory. Otherwise we would have to...

Speaking about option 1. it is actually quite simple - it contradicts observations. It is obvious with quite simple three polarizers experiment: