Fluctuation Theorem, Big Bang Question

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SUMMARY

The discussion centers on the Fluctuation Theorem and its implications for the early universe, particularly regarding entropy and the concept of time. Lucretius posits that during the Big Bang singularity, when the universe was extremely small, entropy may have decreased as often as it increased, potentially negating the conventional flow of time. A participant confirms that many models suggest time and spatial dimensions emerged from the Big Bang, indicating that time as we understand it did not exist initially.

PREREQUISITES
  • Understanding of the Fluctuation Theorem
  • Basic knowledge of entropy in thermodynamics
  • Familiarity with Big Bang cosmology
  • Concepts of quantum fluctuations
NEXT STEPS
  • Research the implications of the Fluctuation Theorem in thermodynamics
  • Study models of time emergence from the Big Bang
  • Explore the relationship between entropy and quantum fluctuations
  • Investigate theories on the nature of time in cosmology
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Physicists, cosmologists, and anyone interested in the foundational concepts of time, entropy, and the early universe.

Lucretius
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I have a question. I decided not to put it in the "theory" section because I'm no physicist and I don't know if I'm right.

From what I understand about the fluctuation theorem, the smaller the area in which it takes place, the more likely entropy is to decrease. Could it be at the beginning of the universe, when everything was very very small, that entropy decreased as often as it increased? Would this get rid of the notion of time? Could quantum fluctuations throw off this balance between decrease and increase, which would lead to the forward flow of time and the universe as we know it?

I hope these aren't too many questions.

Thanks,
Lucretius
 
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If you posit a BB singularity, time did not initially exist. So in that sense your question is on target. Many models predict that time and spatial dimensions emerged from the BB - even before matter and energy. What happens after that is more interesting.
 

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