- #1
Naty1
- 5,606
- 40
I came across this statement from James Hartle on Stephen Hawking's website,
http://www.hawking.org.uk/
and wondered where you see this proposal currrently [Hartle sure seems to think it explains an awful lot] :
James Hartle:
Wikipedia has a brief discussion here:
Hartle–Hawking state
http://en.wikipedia.org/wiki/Hartle–Hawking_state
which explains that
If there are updates in ARXIV I'd be interested in a few you experts consider worthwhile...I could not find anything, but that's likely a reflection of my lack of search skills...
Are there any 'competing theories' where time emerges before space...or other entities come first, say, gravity...??
http://www.hawking.org.uk/
and wondered where you see this proposal currrently [Hartle sure seems to think it explains an awful lot] :
James Hartle:
...Today, more than 25 years after its proposal, the no-boundary state has successfully explained the origin of classical spacetime, the origin of the detailed structure of the universe seen in the distribution of galaxies, and the arrows of time of the universe. Stephen, Thomas Hertog, and I are continuing to work to see how far the no boundary
quantum state can go in explaining our quantum universe."
Wikipedia has a brief discussion here:
Hartle–Hawking state
http://en.wikipedia.org/wiki/Hartle–Hawking_state
which explains that
...the theory is a quantum gravity proposal concerning the state of the universe prior to the Planck epoch... that there was no time before the Big Bang because time did not exist before the formation of spacetime associated with the Big Bang...that if we could travel backward in time ... time gives way to space such that at first there is only space and no time... According to ... Hartle-Hawking [the] universe has no beginning... it simply has no initial boundaries in time nor space...According to the theory time diverged from three state dimension - as we know the time now - after the Universe was at the age of the Planck time.[1]
If there are updates in ARXIV I'd be interested in a few you experts consider worthwhile...I could not find anything, but that's likely a reflection of my lack of search skills...
Are there any 'competing theories' where time emerges before space...or other entities come first, say, gravity...??