97 research outputs found
Late D-term Inflation and the Cosmological Moduli Problem in TeV Scale Strings
We show that a short period of late D-term inflation can solve the
cosmological moduli (radion) problem of (asymmetric) inflation at the TeV
scale. Late inflation happens after the large compact dimensions are stabilized
which is crucial for obtaining the extremely small Hubble constant and inflaton
mass required.Comment: 12 pages in phyzzx.tex, one reference adde
Universal Counting of Black Hole Entropy by Strings on the Stretched Horizon
We show that the entropy of any black object in any dimension can be
understood as the entropy of a highly excited string on the stretched horizon.
The string has a gravitationally renormalized tension due to the large redshift
near the horizon. The Hawking temperature is given by the Hagedorn temperature
of the string. As examples, we consider black holes with one (black p-branes)
or two charges, Reissner-Nordstrom black holes and the BTZ black hole in
addition to Schwarzschild black holes. We show that the vanishing and
nonvanishing extremal entropies can be obtained as smooth limits of the
near-extreme cases.Comment: 21 pages in phyzzx.tex, numerous minor changes, dyonic string added
as an example, one reference adde
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