搜索结果: 1-14 共查到“理论天体物理学 Inflation”相关记录14条 . 查询时间(0.14 秒)
We consider a simple extension of the Standard Model Higgs inflation with one new real scalar field which preserves unitarity up to the Planck scale. The new scalar field (called sigma) completes in ...
Inflation with improved D3-brane potential and the fine tunings associated with the model
improved D3-brane potential the fine tunings associated
2011/1/13
We investigate brane-antibrane inflation in a warped deformed conifold background that includes contributions to the potential arising from imaginary anti-self-dual (IASD) fluxes including the term wi...
Curvature Perturbations and non-Gaussianities from Waterfall Phase Transition during Inflation
Curvature Perturbations non-Gaussianities
2011/1/13
We consider a variant of hybrid inflation where the waterfall phase transition happens during inflation. By adjusting the parameters associated with the mass of the waterfall field, we arrange that t...
Nongaussianity from Particle Production During Inflation
Nongaussianity Particle Production Inflation
2011/1/11
In a variety of models the motion of the inflaton may trigger the production of some non-inflaton particles during inflation, for example via parametric resonance or a phase transition. Such models ha...
Anisotropic Inflation from Charged Scalar Fields
Anisotropic Inflation Charged Scalar Fields
2011/1/11
We consider models of inflation with $U(1)$ gauge fields and charged scalar fields including symmetry breaking potential, chaotic inflation and hybrid inflation. We show that there exist attractor sol...
Perturbations and observational aspects of mutated hilltop inflation
observational aspects mutated hilltop inflation
2011/1/13
We perform a careful investigation of cosmological perturbations and observational aspects, taking mutated hilltop inflation as a representative model. Employing mostly analytical treatment, we derive...
Enhanced Inflation in the Dirac-Born-Infeld framework
brane inflation DBI theory form invariance symmetry
2010/11/15
We consider the Einstein equations within the DBI scenario for a spatially flat Friedmann-
Robertson-Walker (FRW) spacetime without a cosmological constant. We derive the inflationary
scenario by ap...
Optimizing future experimental probes of inflation
Optimizing future experimental probes of inflation
2010/11/9
The discovery of many novel realizations of the in ationary universe paradigm has led to a degeneracy problem: many di erent in ationary Lagrangians generate the same perturbation spectra.Resolving th...
The inflationary paradigm has enjoyed phenomenological success, however, a compelling particle
physics realization is still lacking. The key obstruction is that the requirement of a suitably flat sca...
The purpose of these lectures is to give a pedagogical introduction to inflation and the production of primordial perturbations, as well as a review of some of the latest developments in this domain. ...
Consistency relation for the Lorentz invariant single-field inflation
shape bispectrum Lorentz invariant single-field inflation
2010/3/19
In this paper we compute the sizes of equilateral and orthogonal shape bispectrum for the general Lorentz invariant single-field inflation. The stability of field theory implies a non-negative square ...
Towards a Holographic Description of Inflation and Generation of Fluctuations from Thermodynamics
Verlinde conjectured entropic force gravity
2010/3/19
Recently, Verlinde conjectured that gravity may be an entropic force, arising from thermodynamics on the holographic screen. We investigate the implications of the entropic force formalism for inflati...
Scalar-Scalar, Scalar-Tensor, and Tensor-Tensor Correlators from Anisotropic Inflation
Scalar-Tensor Scalar-Scalar Tensor-Tensor Anisotropic Inflation
2010/3/22
We compute the phenomenological signatures of a model (Watanabe et al' 09) of anisotropic inflation driven by a scalar and a vector field. The action for the vector is U(1) invariant, and the model is...
Slow-roll inflation with a Gauss-Bonnet correction
Slow-roll inflation Gauss-Bonnet correction
2010/3/19
We consider slow-roll inflation for a single scalar field with an arbitrary potential and an arbitrary non-minimal coupling to the Gauss-Bonnet term. By introducing a combined hierarchy of Hubble and ...