How Would Confirmed Varying Constants Impact Loop Quantum Gravity?

  • Context: Graduate 
  • Thread starter Thread starter Sauron
  • Start date Start date
  • Tags Tags
    Constants Lqg
Click For Summary
SUMMARY

The discussion centers on the implications of confirmed variations in fundamental constants, particularly the fine structure constant (alpha), on Loop Quantum Gravity (LQG). It is established that LQG relies heavily on the equivalence principle, and any violation of this principle raises questions about the validity of LQG. Researchers like Magueijo, known for work on varying speed of light theories, suggest potential adaptations for LQG in light of these variations. Additionally, evidence from distant quasar spectral lines indicates that fundamental constants may have differed in the early universe, which could impact our understanding of cosmic expansion.

PREREQUISITES
  • Understanding of Loop Quantum Gravity (LQG)
  • Familiarity with the equivalence principle
  • Knowledge of fundamental constants, particularly the fine structure constant (alpha)
  • Awareness of varying speed of light theories and contributions from researchers like Magueijo
NEXT STEPS
  • Research the implications of varying constants on Loop Quantum Gravity
  • Explore the equivalence principle and its role in modern physics
  • Investigate the findings related to spectral lines of distant quasars and their significance
  • Study Magueijo's theories on varying speed of light and their potential applications
USEFUL FOR

Physicists, cosmologists, and researchers interested in the intersections of fundamental constants, quantum gravity theories, and cosmic expansion dynamics.

Sauron
Messages
99
Reaction score
0
Today someone has asked me about the evidences about the variations of fundamental constants (mainly alpha)

As it is known that variation attemps versus the equivalence principle.

So i wonder, if that variation would be irrefutably confirmed how would it affect LQG?

I mean, LQG depends strongly in the equivalence principle. If that is violated from the very first still makes sense to do LQG?

I remeber that Magueijo, on ofthe more active researchers in VSL´s had gone to the perimeter institute soi suspect it can be some workaround to do LQG even if alpha is not a constant. Someone has detaills?
 
Physics news on Phys.org
Sauron said:
Today someone has asked me about the evidences about the variations of fundamental constants (mainly alpha)

As it is known that variation attemps versus the equivalence principle.

So i wonder, if that variation would be irrefutably confirmed how would it affect LQG?

I mean, LQG depends strongly in the equivalence principle. If that is violated from the very first still makes sense to do LQG?

I remeber that Magueijo, on ofthe more active researchers in VSL´s had gone to the perimeter institute soi suspect it can be some workaround to do LQG even if alpha is not a constant. Someone has detaills?
I saw an article a couple of days ago which says that the spectral lines of very distant quazars indicate that the fundamental constants may have been differents in the early universe. Did anyone else catch that article?

Yes, I wonder how this would effect LQG. And I wonder how that would effect the accelerating expansion rate of the univerese.

Yea, just found it. The article is here:

http://msnbc.msn.com/id/13816702/

For example, if the fine structure constant was stronger in the past, would that mean that supernovae would be brighter in the past than today so that their dimmer appearance means they are farther away than expected so that the cosmological expansion is accelerating more than expected?
 
Last edited: