Is a zero energy universe a consequence from FRWL equations

AI Thread Summary
The discussion centers on whether a zero energy universe arises from the Friedmann-Robertson-Walker (FRWL) equations and their relationship to Einstein's equations. It questions if FRWL equations are a subset of Einstein's equations and whether these frameworks allow for non-zero energy universes. Participants reference several academic papers to explore these concepts further. The implications of these equations on the nature of the universe's energy state are critically examined. Overall, the conversation seeks to clarify the foundational principles of cosmology as they relate to energy levels in the universe.
hurk4
Messages
131
Reaction score
0
In order to speed up an insight into this question, which I posed to myself, I try PF to give me one or more reactions.
My complete question is:
Is a zero universe a consequence of FRWL equations/solutions? Are FRWL equations/solutions a subset of the Einstein equations? If yes, to one or both questions, do Einsteins SR and or GR equations leave freedom for for non-zero energy universes? :frown:
 
Space news on Phys.org
Not necessarily. Some papers to consider:

Birth of the Universe
http://zebu.uoregon.edu/~js/ast123/lectures/lec17.html

A Universe from Nothing
http://www.astrosociety.org/pubs/mercury/31_02/nothing.html

Simple quantum cosmology: Vacuum energy and initial state
http://arxiv.org/abs/gr-qc/0501014
 
Last edited by a moderator:

Thread 'Matter density right after the decoupling'

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##.
View full post »

Thread 'Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".'

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...
View full post »

Thread 'Big Bang and Infinite Universe'

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...
View full post »

Similar threads

I Questions on the consequence of an evolving dark energy parameter
Replies
1
Views
1K
I Creation of our universe from zero energy?
Replies
8
Views
2K
B Why doesn't cosmic inflation violate conservation of energy?
Replies
3
Views
3K
Is the Total Energy of the Universe Really Zero?
Replies
16
Views
3K
Does Zero Net Energy equal Zero Energy?
Replies
10
Views
3K
B Is Dark Energy Really Driving the Expansion of the Universe?
Replies
13
Views
2K
I Expanding universe and quantum wavefunctions
Replies
11
Views
3K
Berman's zero energy condition for universe
Replies
6
Views
3K
I Zero-Energy Universe: Reliable Source?
Replies
7
Views
2K
Zero Energy Universe: Examining Conservation of Energy in Cosmology
Replies
9
Views
5K

Hot Threads

Recent Insights

Back
Top