Inflation and initial conditions

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SUMMARY

The discussion centers on the fine-tuning problem in cosmology, specifically regarding inflation and its initial conditions. Participants reference a paper from ScienceDirect that addresses whether the Loop Quantum Cosmology (LQC) bounce solution resolves this issue. Skepticism is expressed about the LQC solution due to its reliance on a highly homogeneous and isotropic collapsing phase, which is viewed as unnatural. The conversation seeks clarification on whether the proposed solution in the paper aligns with the fine-tuning problem outlined in the Wikipedia article.

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  • Understanding of cosmological inflation
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  • Basic grasp of homogeneous and isotropic conditions in cosmology
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skydivephil
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Its been argued that inflation needs the initial conditions to be finely tuned: eg:
http://en.wikipedia.org/wiki/Inflation_(cosmology)#Fine-tuning_problem
does this paper resolve this problem?

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVN-514R65K-2&_user=10&_coverDate=11%2F01%2F2010&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=3f86104ee19f80e65b0d9639614e0380&searchtype=a
 
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skydivephil said:
Its been argued that inflation needs the initial conditions to be finely tuned: eg:
http://en.wikipedia.org/wiki/Inflation_(cosmology)#Fine-tuning_problem
does this paper resolve this problem?

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVN-514R65K-2&_user=10&_coverDate=11%2F01%2F2010&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=3f86104ee19f80e65b0d9639614e0380&searchtype=a
Well, personally, I remain extremely skeptical of the LQC bounce solution. The problem I have with it is that it so far seems to require a collapsing phase which is highly homogeneous and isotropic. But that is just incredibly unnatural, as any inhomogeneities pre-collapse will have been exacerbated as the collapse occurred.
 
Sorry, I didnt mean to ask if the paper is a satisfactory solution or to assess LQC, merely to ask if the proposed solution is referring to the same problem as is mentioned in the wikipedia article.Or is it referring to something else? It seems to me to be the case, but as someone with no expertise in this field , I just wanted to check.
 

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