Non-linear perturbations in multiple-field inflation

Details Non-linear perturbations in multiple-field inflation Non-linear perturbations in multiple-field inflation

2005-04-22

arxiv.org/abs/astro-ph/0504508v4

Phys.Rev. D73 (2006) 083521

Astronomy and Astrophysics

Astrophysics

13 pages, no figures. v4: Included general form of equations of motion and constraints (before fixing gauge); minor textual ch

Scientific paper

10.1103/PhysRevD.73.083521

We develop a non-linear framework for describing long-wavelength perturbations in multiple-field inflation. The basic variables describing inhomogeneities are defined in a non-perturbative manner, are invariant under changes of time slicing on large scales and include both matter and metric perturbations. They are combinations of spatial gradients generalising the gauge-invariant variables of linear theory. Dynamical equations are derived and supplemented with stochastic source terms which provide the long-wavelength initial conditions determined from short-wavelength modes. Solutions can be readily obtained via numerical simulations or analytic perturbative expansions. The latter are much simpler than the usual second-order perturbation theory. Applications are given in a companion paper.

Affiliated with

Also associated with

No associations

Rating

Non-linear perturbations in multiple-field inflation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Non-linear perturbations in multiple-field inflation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-linear perturbations in multiple-field inflation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-612234