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Challenges for string cosmology
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DOI：10.1088/0264-9381/28/20/204002.png)
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Abstract
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We critically assess the twin prospects of describing the observed universe in string theory, and using cosmological experiments to probe string theory. For the purposes of this short review, we focus on the limitations imposed by our incomplete understanding of string theory. After presenting an array of significant obstacles, we indicate a few areas that may admit theoretical progress in the near future.
Keywords:
INFLATIONARY UNIVERSE
COMPACTIFICATIONS
SUPERSTRINGS
DIMENSIONS
HIERARCHY
LECTURES
FLATNESS
HORIZON
FERMI
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