The "in-in" Formalism and Cosmological Perturbations

Details The "in-in" Formalism and Cosmological Perturbations The "in-in" Formalism and Cosmological Perturbations

2009-04-27

arxiv.org/abs/0904.4207v3

Phys.Rev.D80:083521,2009

Physics

High Energy Physics

High Energy Physics - Theory

9 pages. 2 figures. Minor revisions. Submitted to PRD

Scientific paper

10.1103/PhysRevD.80.083521

We describe an efficient scheme for evaluating higher order contributions to primordial cosmological perturbations using the "in-in" formalism, which is the basis of modern calculations of non-Gaussian and higher order contributions to the primordial spectrum. We show that diagrams with two or more vertices require careful handling. We present an implementation of the operator formalism in which these diagrams can be evaluated in a simple and transparent fashion. We illustrate our methodology by evaluating the correction to the primordial gravitational wave spectrum generated by scalar loops, a 2-vertex, 1-loop interaction. We then look at a generalized $N$-point, 2-vertex diagram.

Affiliated with

Also associated with

No associations

Rating

The "in-in" Formalism and Cosmological Perturbations 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 The "in-in" Formalism and Cosmological Perturbations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The "in-in" Formalism and Cosmological Perturbations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-323167