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- W2121511251 abstract "Closed string tachyon condensation in spacetime generates potentials on the worldsheet that model two-dimensional inflationary cosmology. These models illustrate and elucidate a variety of aspects of inflation, in particular the generation of quantum fluctuations and their back reaction on geometry. We exhibit a class of Liouville gravity models coupled to matter that can exhibit, for example, (a) pure de Sitter gravity, (b) slow-roll inflation, (c) topological inflation, and (d) graceful exit into a Friedmann-Robertson-Walker (FRW) phase. The models also provide a quantitative testing ground for ideas about the origin of inflation, such as the various ``no-boundary or tunnelling'' proposals, and the ``eternal or chaotic'' inflationary scenario. We suggest an alternative mechanism for quantum creation of cosmological spacetimes which, in the context of the model, provides a natural explanation for why the typical FRW cosmology at large scales underwent a period of inflation at small scale." @default.
- W2121511251 created "2016-06-24" @default.
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- W2121511251 date "2003-09-08" @default.
- W2121511251 modified "2023-10-06" @default.
- W2121511251 title "Closed string tachyon condensation and worldsheet inflation" @default.
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- W2121511251 doi "https://doi.org/10.1103/physrevd.68.063502" @default.
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