Past eternal universe in inflationary models

  • #1
473
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Assuming inflation is true, we have this paper by Guth, Valenkin and Borde:
http://cdsweb.cern.ch/record/521154
which says that inflation cant be past eternal

and then we have this paper saying it can be made past eternal:
http://arxiv.org/abs/gr-qc/0301042

Can anyone explain to me the discrepancy in layman terms?
 

Answers and Replies

  • #2
Chronos
Science Advisor
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Difference of opinon among respectable scientists. The eternal bounce scenario is not appealing because it inadequately explains how energy is recovered between cycles, imo.
 
  • #3
473
9
Thanks for that Chronos, can you describe in layman terms what are the different assumptions that lead them to the different conclusions? is there a consensus on this question amonst other comsologists?
 

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