Can Cosmic Inflation Explain the Accelerating Universe?

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SUMMARY

The discussion centers on the relationship between cosmic inflation and the accelerating universe, questioning whether cosmic inflation can adequately explain this phenomenon or if alternative theories such as superstring theory and dark energy are more viable. Key issues include the discrepancy between the predicted energy levels during cosmic inflation and current observations, as well as the existence of the hypothetical inflaton particle. The conversation highlights the ongoing quest for understanding the universe, drawing parallels to ancient philosophical inquiries.

PREREQUISITES
  • Understanding of cosmic inflation theory
  • Familiarity with dark energy concepts
  • Knowledge of superstring theory and extra dimensions
  • Basic grasp of particle physics, particularly proton decay
NEXT STEPS
  • Research the implications of dark energy on cosmic expansion
  • Explore superstring theory and its potential to explain gravity leakage
  • Study the role of the inflaton scalar field in cosmic inflation
  • Examine current experimental findings related to proton decay
USEFUL FOR

Astronomers, physicists, and anyone interested in theoretical cosmology and the fundamental questions surrounding the universe's structure and expansion.

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If the hot Big-Bang model is accurate (and seems like it is), could cosmic inflation (maybe a further extension) explain why the universe is accelerating or will we have to retreat to extra-dimensions (superstring theory and leaking gravity)?

There are other problems with this theory of course (as in most others). E.g, the present universe has much lower energy than cosmic inflation predicts. Also the theory predicts an unknown particle called ''inflaton''. Does it have anything to do with proton decay (which is not consistent with experiments)?

So the best candidates are:

1. Dark energy
2. Superstring theory (extra-dimensions and leaking gravity)
3. Cosmic inflation (which also predicts the inflaton scalar field)

2000 years ago the Greeks asked what the universe is made of. Seems like today we are not much different from them. We are now the ancients and it will probably take us another 2000 years (if not more) to fully anwer their question.

Edit: See also Introductory review of cosmic inflation
 
Last edited:
Astronomy news on Phys.org
So, do you think you have a better answer than the 'mainstream' solution?
 
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True, i don't. Today, no one on Earth is smart enough to offer a better answer to this kind of questions.
 

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