I Topological phase transitions for the whole Universe...?

AI Thread Summary
Grigory Volovik proposes that the universe may have undergone a topological phase transition, especially in its early stages, as detailed in his book "*The Universe in a Helium Droplet*." He suggests that fundamental symmetries could emerge from a more fundamental state lacking symmetries, akin to Holger Nielsen's "random dynamics" concept. While Volovik acknowledges the possibility of such a transition, he emphasizes that there is no definitive evidence it occurred. Critics argue that without empirical support, the idea remains speculative and question the validity of claiming any such transitions are possible. Ultimately, the discussion highlights the need for further observations to determine the feasibility of these theoretical models.
Suekdccia
Messages
352
Reaction score
30
TL;DR Summary
Topological phase transitions for the whole universe...?
Physicist Grigory Volovik has put forward some ideas about the universe undergoing a topological phase transition (especially in the early stages of the universe). He published a book called "*The Universe in a Helium Droplet*" where he explained his ideas. You can find a brief discussion here (https://arxiv.org/abs/1407.6681).

In one discussion I had with Mr. Volovik, he mentioned that depending on the type of topological phase transition that could have occurred in the universe, all the fundamental symmetries of the universe (spacetime symmetries, translation symmetries, CPT invariance, internal invariances...) could be all emergent from a more fundamental state without symmetries (like in Holger Nielsen's "random dynamics" proposal (https://physics.stackexchange.com/questions/526845/what-is-the-universe-in-a-helium-droplet-about) where all symmetries in the universe would be emergent)

I asked him if this was all speculation or if there was some truth behind and he replied that although we don't know if the universe actually took this "path", we know that this topological phase transition would be possible. Since you have a note on the "seriousness" of the book, do you agree? Would that be possible according to what we currently know about physics (although we don't know if this actually occurred at some point of the universe's history)? Or, on the contrary, we don't even know if these transitions are even possible to begin with?
 
Space news on Phys.org
Suekdccia said:
Would that be possible according to what we currently know about physics
I don't see how anyone could claim that we know such a thing is possible, since we have no evidence that any such thing has happened and the only theoretical models that contain such a possibility are speculative ones that also have no evidence to support them.
 
It is not even clear what it means to know anything is possible that we don't know has happened, or to know the alternative, that something is impossible. It seems better to simply avoid either term in science, since science is about what seems most likely, not what seems possible or impossible. We are simply trying to decide where to invest our efforts, and what observations we need to do, so the right way to say it is not that we know it is possible that such a phase change could occur, but to argue that it is worth such-and-such investment or observation to decide if such a phase change actually did occur. That's all that needs be said, or can be said, in science. (At the end of the day, science is always about winning a bet. If we have cancer, we turn to science not because we know something is possible or impossible, but simply because we think it maximizes our chances, so is worth the investment.)
 
Suekdccia said:
TL;DR Summary: Topological phase transitions for the whole universe...?

Physicist Grigory Volovik has put forward some ideas about the universe undergoing a topological phase transition (especially in the early stages of the universe). He published a book called "*The Universe in a Helium Droplet*" where he explained his ideas. You can find a brief discussion here (https://arxiv.org/abs/1407.6681).

In one discussion I had with Mr. Volovik, he mentioned that depending on the type of topological phase transition that could have occurred in the universe, all the fundamental symmetries of the universe (spacetime symmetries, translation symmetries, CPT invariance, internal invariances...) could be all emergent from a more fundamental state without symmetries (like in Holger Nielsen's "random dynamics" proposal (https://physics.stackexchange.com/questions/526845/what-is-the-universe-in-a-helium-droplet-about) where all symmetries in the universe would be emergent)

I asked him if this was all speculation or if there was some truth behind and he replied that although we don't know if the universe actually took this "path", we know that this topological phase transition would be possible.
Well, models have predictions, Does his model have predictions? ...from theory to observations.
à la inflationary model (or others)
 
https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
Hi, I’m pretty new to cosmology and I’m trying to get my head around the Big Bang and the potential infinite extent of the universe as a whole. There’s lots of misleading info out there but this forum and a few others have helped me and I just wanted to check I have the right idea. The Big Bang was the creation of space and time. At this instant t=0 space was infinite in size but the scale factor was zero. I’m picturing it (hopefully correctly) like an excel spreadsheet with infinite...
Back
Top