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Bret Underwood
Researcher at Pacific Lutheran University
Publications - 41
Citations - 1571
Bret Underwood is an academic researcher from Pacific Lutheran University. The author has contributed to research in topics: Brane & Moduli. The author has an hindex of 20, co-authored 40 publications receiving 1456 citations. Previous affiliations of Bret Underwood include McGill University & University of Wisconsin-Madison.
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Dynamics of Warped Flux Compactifications
TL;DR: In this article, the four dimensional effective action for type IIB flux compactifications is discussed, and the quadratic terms taking warp effects into account are derived, including the warped Kahler potential for metric moduli.
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Minimal Simple de Sitter Solutions
TL;DR: In this article, it was shown that the minimal set of necessary ingredients to construct explicit, four-dimensional de Sitter solutions from IIA string theory at tree level are O6-planes, nonzero Romans mass parameter, form fluxes, and negative internal curvature.
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Multifield Dirac-Born-Infeld inflation and non-Gaussianities
TL;DR: In this article, the trajectories for multifield Dirac-Born-Infeld inflation were analyzed in brane inflation models, and it was shown that trajectories are the same as in typical slow roll inflation.
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DBI inflation in the tip region of a warped throat
TL;DR: In this paper, the authors consider a generalized warp-throat and show that it is possible to obtain 60 or more e-folds in the constant region, however large non-gaussianities are typically produced due to the small sound speed of fluctuations.
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The Universal Kaehler Modulus in Warped Compactifications
TL;DR: In this article, the universal Kaehler modulus in warped compactifications using the Hamiltonian formulation of general relativity is constructed at the linear level for both the volume modulus and its axionic partner, and nontrivial cancellations of warping effects are found in the dimensional reduction.