Hamilton-Jacobi formalism for inflation with non-minimal derivative coupling
Abstract
In inflation with nonminimal derivative coupling there is not a conformal transformation to the Einstein frame where calculations are straightforward, and thus in order to extract inflationary observables one needs to perform a detailed and lengthy perturbation investigation. In this work we bypass this problem by performing a Hamilton-Jacobi analysis, namely rewriting the cosmological equations considering the scalar field to be the time variable. We apply the method to two specific models, namely the power-law and the exponential cases, and for each model we calculate various observables such as the tensor-to-scalar ratio, and the spectral index and its running. We compare them with 2013 and 2015 Planck data, and we show that they are in a very good agreement with observations.
Keywords
Cite
@article{arxiv.1603.03883,
title = {Hamilton-Jacobi formalism for inflation with non-minimal derivative coupling},
author = {Haidar Sheikhahmadi and Emmanuel N. Saridakis and Ali Aghamohammadi and Khaled Saaidi},
journal= {arXiv preprint arXiv:1603.03883},
year = {2016}
}
Comments
19 pages, 6 figures, version published in JCAP