Results 41 to 50 of about 46,785 (128)
Cosmological Inflation: Theory and Observations [PDF]
Advanced Science Letters, 2009 In this article we review the theory of cosmological inflation with a particular focus on the beautiful connection it provides between the physics of the very small and observations of the very large. We explain how quantum mechanical fluctuations during the inflationary era become macroscopic density fluctuations which leave distinct imprints in the ...
Hiranya V. Peiris, Daniel Baumann
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Observational Exclusion of a Consistent Quantum Cosmology Scenario
, 2015 It is often argued that inflation erases all the information about what took place before it started. Quantum gravity, relevant in the Planck era, seems therefore mostly impossible to probe with cosmological observations.
Barrau, Aurelien +3 more
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Unity of Cosmological Inflation Attractors
Physical Review Letters, 2015 Recently, several broad classes of inflationary models have been discovered whose cosmological predictions, in excellent agreement with Planck, are stable with respect to significant modifications of the inflaton potential. Some classes of models are based on a nonminimal coupling to gravity. These models, which we call ξ attractors, describe universal
Renata Kallosh +3 more
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Cosmic curvature from de Sitter equilibrium cosmology
, 2011 I show that the de Sitter Equilibrium cosmology generically predicts observable levels of curvature in the Universe today. The predicted value of the curvature depends only on the ratio of the density of non-relativistic matter to energy density in ...
Albrecht, Andreas
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INFLATION AS AN ATTRACTOR IN SCALAR COSMOLOGY [PDF]
Modern Physics Letters A, 2013 We study an inflation mechanism based on attractor properties in cosmological evolutions of a spatially flat Friedmann–Robertson–Walker spacetime based on the Einstein-scalar field theory. We find a new way to get the Hamilton–Jacobi equation solving the field equations.
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Cosmology: The test of inflation [PDF]
Nature, 2009 As the launch of the Planck spacecraft approaches, Eric Hand investigates what the mission could mean for the predominant theory of the moments after the Big Bang.
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Onset of inflation in inhomogeneous cosmology [PDF]
Physical Review D, 1997 We study how the initial inhomogeneities of the universe affect the onset of inflation in the closed universe. We consider the model of a chaotic inflation which is driven by a massive scalar field. In order to construct an inhomogeneous universe model, we use the long wavelength approximation ( the gradient expansion method ). We show the condition of
Osamu Iguchi, Hideki Ishihara
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, 2015 Supersymmetry is the most natural framework for physics above the TeV scale, and the corresponding framework for early-Universe cosmology, including inflation, is supergravity.
Ellis, John +3 more
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Interesting consequences of brane cosmology [PDF]
, 2001 We discuss cosmology in four dimensions within a context of brane-world scenario.Such models can predict chaotic inflation with very low reheat temperature depending on the brane tension.
A. Falkowski +24 more
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, 2012 The very basics of cosmological inflation are discussed. We derive the equations of motion for the inflaton field, introduce the slow-roll parameters, and present the computation of the inflationary perturbations and their connection to the temperature fluctuations of the cosmic microwave background.
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