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A Meandering Inflaton
If the cosmological inflationary scenario took place in the cosmic landscape
in string theory, the inflaton, the scalar mode responsible for inflation,
would have meandered in a complicated multi-dimensional potential. We show that
this meandering property naturally leads to many e-folds of inflation, a
necessary condition for a successful inflationary scenario. This behavior also
leads to fluctuations in the primordial power spectrum of the cosmic microwave
background radiation, which may be detected in a near future cosmic variance
limited experiment like PLANCK.Comment: minor additions, matched to published versio
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