搜索结果: 1-15 共查到“物理学 Inflation”相关记录50条 . 查询时间(0.067 秒)
An Effective Theory of Initial Conditions in Inflation
The new physics cosmic microwave radiation power spectrum
2014/12/20
We examine the renormalization of an effective theory description of a general initial state set in an isotropically expanding space-time, which is done to understand how to include the effects of new...
Nonisotropy in the CMB power spectrum in single field inflation
Inflation the space gradient field the initial value the radiation power spectrum
2014/12/19
Contaldi et al. [C. R. Contaldi, M. Peloso, L. Kofman, and A. Linde, J. Cosmol. Astropart. Phys. 07 (2003) 002] have suggested that an initial period of kinetic energy domination in single field...
Gravitational Wave Production through Decay of the Inflaton into Intermediary Fields During Slow Roll Inflation
Gravitational Wave Intermediary Fields Slow Roll Inflation
2014/11/20
This dissertation looks for possible observable signals of tensor metric perturbations sourced during slow roll inflation from decay of the inflaton field into other intermediary fields. We focus on t...
Inflation from R^2 gravity: a new approach using nonlinear electrodynamics
inflation nonlinear Lagrangian
2010/12/21
We discuss another approach regarding the inflation from the R2 the-ory of gravity originally proposed by Starobinski. A non-singular early cosmology is proposed, where, adding a nonlinear electrodyna...
We derive semi-analytic formulae for the local bispectrum and trispectrum in general two-field inflation and provide a simple geometric recipe for building observationally allowed models with observa...
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 scal...
We propose a warm inflationary model in the context of relativistic D-brane inflation in a warped throat. The inflaton has Dirac-Born-Infeld (DBI) kinetic term and is coupled to radiation through a di...
Mutated hybrid inflation in $f(R,{\Box}R)$-gravity
Mutated hybrid inflation High Energy Physics
2010/12/23
A new hybrid inflationary scenario in the context of $f(R,{\Box}R)$-gravity is proposed. Demanding the waterfall field to 'support the potential from below' [unlike the original proposal by Stewart i...
We discuss the hybrid inflation model where the inflaton field is nonminimally coupled to gravity.In the Jordan frame, the potential contains φ4 term as well as terms in the original hybrid inflation ...
On the one hand, inflation is an extremely convincing scenario: it solves most cosmological paradoxes and generates fluctuations that became the seeds for the growth of structures. It, however, suffer...
Optimizing future experimental probes of inflation
Optimizing future experimental probes inflation
2010/12/24
The discovery of many novel realizations of the inflationary universe paradigm has led to a degeneracy problem: many different inflationary Lagrangians generate the same perturbation spectra. Resolvi...
Galilean symmetry in the effective theory of inflation: new shapes of non-Gaussianity
Galilean symmetry effective theory inflation
2010/12/23
We study the consequences of imposing an approximate Galilean symmetry on the Effective Theory of Inflation, the theory of small perturbations around the inflationary background. This approach allows...
Non-Gaussianities in Multifield Inflation: Superhorizon Evolution, Adiabaticity, and the Fate of fnl
Multifield Inflation Superhorizon Evolution
2010/12/27
We explore the superhorizon generation of large fnl of the local form in two field inflation. We calculate the two- and three-point observables in a general class of potentials which allow for an ana...
Entropy Production during Asymptotically Safe Inflation
Entropy Production Asymptotically Safe Inflation
2010/12/23
The Asymptotic Safety scenario predicts that the deep ultraviolet of Quantum Einstein Gravity is governed by a nontrivial renormalization group fixed point. Analyzing its implications for cosmology us...
On the measure problem in slow roll inflation and loop quantum cosmology
slow roll inflation loop quantum cosmology
2010/12/27
We consider the measure problem in standard slow-roll inflationary models from the perspective of loop quantum cosmology (LQC). Following recent results by Ashtekar and Sloan, we study the probabilit...