Big Bounce and varying constants

  • Context: Graduate 
  • Thread starter Thread starter skydivephil
  • Start date Start date
  • Tags Tags
    Bounce Constants
Click For Summary
SUMMARY

The discussion centers on the concept of the Big Bounce and the implications of varying physical constants during the Big Crunch phase, particularly within the first 10−43 seconds. The original observation from Wikipedia suggests that fundamental constants, including the speed of light, may not remain constant during this critical interval. Participants question whether this variability is universally applicable to all bouncing cosmologies, some, or none, and express concern over the lack of literature addressing this topic. The consensus indicates that regular bounce models typically rely on fixed constants, raising questions about the viability of models that do not adhere to this principle.

PREREQUISITES
  • Understanding of cosmological models, specifically bouncing cosmologies.
  • Familiarity with fundamental physical constants and their roles in physics.
  • Knowledge of the Big Crunch theory and its implications for the universe's evolution.
  • Basic grasp of scientific literature review and citation practices.
NEXT STEPS
  • Research the implications of varying constants in cosmological models.
  • Explore the concept of bouncing cosmologies and their theoretical frameworks.
  • Investigate existing literature on the Big Crunch and its associated theories.
  • Examine models that incorporate variable constants, such as modified gravity theories.
USEFUL FOR

Astronomers, theoretical physicists, and cosmologists interested in the dynamics of the universe's evolution and the implications of varying constants in cosmological models.

skydivephil
Messages
470
Reaction score
9
I noticed this on the wikipedia page of the big bounce:
" All the so-called fundamental physical constants, including the speed of light in a vacuum, were not so constant during the Big Crunch, especially in the interval stretching 10−43 seconds before and after the point of inflection. "
http://en.wikipedia.org/wiki/Big_Bounce


But I haven't noticed much discussion of this in the literature and there is no referecne to it on the wiki page itself, not even a "citation needed" either.
Is this somehting:
1) necessarily implied by bouncing comsologies?
2) implied by some bouncing comsologies but not others?
3) never mentioned in bouncing comsologies?

Anyone know any references where this is discussed in the literature?
 
Space news on Phys.org
That sounds like extreme speculation to me. There are regular bounce models that don't do anything funny at the bounce.
 
The trouble with bounce models is they depend on fixed constants. A bounce without a fixed constant, like gravity, is in serious trouble.
 

Similar threads

Graduate What Do Canonical Quantum Gravity Models Tell Us About the Big Bang?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Quantum cosmo test prospects (sampling the literature)
  • · Replies 5 ·
Replies
5
Views
4K
Graduate A clock tower puzzle in a gravitational field
  • · Replies 3 ·
Replies
3
Views
2K
High School QFT & QM Questions (about time, locality, gravity, etc.)
  • · Replies 6 ·
Replies
6
Views
3K
Requesting suggestions for languages, libraries, and architectures for parallel (and sometimes non parallel) numerical and scientific computations
  • · Replies 8 ·
Replies
8
Views
5K
Undergrad Muon g-2 as a constraint on new physics
  • · Replies 18 ·
Replies
18
Views
4K
Graduate Which Papers Will Shape Future Quantum Gravity Research?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Misconceptions about expanding space
  • · Replies 12 ·
Replies
12
Views
5K
Graduate Sifting through the first quarter 2010 papers
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Is stress a source of gravity?
  • · Replies 264 ·
9
Replies
264
Views
33K