Nonlinear superhorizon perturbations of non-canonical scalar field

Details Nonlinear superhorizon perturbations of non-canonical scalar field Nonlinear superhorizon perturbations of non-canonical scalar field

2008-10-04

arxiv.org/abs/0810.0746v1

JCAP 0901:013,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages

Scientific paper

10.1088/1475-7516/2009/01/013

We develop a theory of non-linear cosmological perturbations at superhorizon scales for a scalar field with a Lagrangian of the form $P(X,\phi)$, where $X=-\partial^{\mu}\phi\partial_{\mu}\phi$ and $\phi$ is the scalar field. We employ the ADM formalism and the spatial gradient expansion approach to obtain general solutions valid up to the second order in the gradient expansion. This formulation can be applied to, for example, DBI inflation models to investigate superhorizon evolution of non-Gaussianities. With slight modification, we also obtain general solutions valid up to the same order for a perfect fluid with a general equation of state $P=P(\rho)$.

Affiliated with

Also associated with

No associations

Rating

Nonlinear superhorizon perturbations of non-canonical scalar field 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 Nonlinear superhorizon perturbations of non-canonical scalar field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonlinear superhorizon perturbations of non-canonical scalar field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-541638