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17 papers · 2 filters
Attractive Lagrangians for Noncanonical Inflation
Paul Franche, Rhiannon Gwyn, Bret Underwood +1
Treating inflation as an effective theory, we expect the effective Lagrangian to contain higher-dimensional kinetic operators suppressed by the scale of UV physics. When these oper…
Fluctuations in a Hořava-Lifshitz Bouncing Cosmology
Xian Gao, Yi Wang, Wei Xue +1
Hořava-Lifshitz gravity is a potentially UV complete theory with important implications for the very early universe. In particular, in the presence of spatial curvature it is possi…
Quasi-Single Field Inflation and Non-Gaussianities
Xingang Chen, Yi Wang
In quasi-single field inflation models, massive isocurvature modes, that are coupled to the inflaton and have mass of order the Hubble parameter, can have nontrivial impacts on den…
Hydrodynamic Long-Time tails From Anti de Sitter Space
Simon Caron-Huot, Omid Saremi
For generic field theories at finite temperature, a power-law falloff of correlation functions of conserved currents at long times is a prediction of non-linear hydrodynamics. We d…
Warped Kaluza-Klein Dark Matter
Andrew R. Frey, Rebecca J. Danos, James M. Cline
Warped compactifications of type IIB string theory contain natural dark matter candidates: Kaluza-Klein modes along approximate isometry directions of long warped throats. These is…
Near Extremal Kerr Entropy from AdS_2 Quantum Gravity
Alejandra Castro, Finn Larsen
We analyze the asymptotic symmetries of near extremal Kerr black holes in four dimensions using the AdS_2/CFT_1 correspondence. We find a Virasoro algebra with central charge c_R=1…