Has this been done? Could then all theories that would violate positivity bounds (causality, unitarity, analyticity, locality, Lorentz invariance), like non-standard (non-wilsonian) UV-complete theories be entailed by such structure then?
I had two rather long questions about the recent programe on searching for UV-completions of EFTs through positivity bounds (that is, UV completions that obey fundamental constraints given by QFTs: unitarity, locality, causality, analyticity and Lorentz invariance)
Question #1:
The EFT-hedron...
So DESI 3 year study results were revealed and when combined with other data from other sources it revealed a 3-sigma significant results that dark energy evolves with time, more specifically that it has been decreasing in the last 11 billion years or so...
No
I'm clearly not expressing myself correctly today. By "turned out to be right" I meant to say that their fidnings turned out to be statistically sifgnificant.
What I'm referring to is that in science we usually need multiple measurements from independent sources to confirm a finding, we...
This is what I was referring to
Returning to the question then, would DESI results confirm an evolving dark energy parameter if they turned out to be right? Or would we need more measurements with other techniques to be sure?
Tomorrow DESI new results from the 3 year study will be released (https://elements.lbl.gov/news/new-measurements-from-desi-shine-light-on-dark-energy/)
If they find again, like in their previous release of the 1st year of the study, that dark energy appears to decrease, contrary to the...
I know that this is speculative and that discussing theoretical models with no evidence supporting them is probably pointless, but I'd like to ask a question about Coleman's baby universe model to understand it better and clarify some questions I have about it:
In this article...
I would like to ask some questions about an interesting paper that was written back in the late 90's (https://arxiv.org/abs/astro-ph/9701131)
There, the authors propose how the universe may evolve from the near future to extremely far time scales
Near the end of it (Section VI, D.), they...
I have a specific question about the theoretical framework of eternal inflation. Indeed a different and important question would be how could this be verified experimentally, but that was not my inquiry. I was asking that question in this forum hoping to find someone working in cosmological...
In the context of the model of eternal inflation, if an inflating "pocket universe" disconnects from an the background spacetime, does it mean that the baby universe itself can have its own spacetime?
can they be described by a different spacetime metric than the background?
if the original...
The papers are indeed advanced but I thought that the specific things that I was asking about (singularity correlators and their validity for more general theories than QFTs) required an intermediate level. Sorry about that
I'm trying to understand this paper (https://arxiv.org/abs/1709.02813) in which the authors try to build a wavefunction for the universe without assuming locality and unitarity, so they would be rather emergent from geometrical constructs called "polytopes" and not assumed from the start (they...
Thank you!
Just one question: would this apply to systems of any arbitrary size if they contain charges? For instance, electrons forming a Wigner crystal would be also destabilized by the theorem?
https://en.m.wikipedia.org/wiki/Wigner_crystal