Inflation model building with an accurate measure of e-folding

Chongchitnan, Sirichai

Abstract

It has become standard practice to take the logarithmic growth of the scale factor as a measure of the amount of inflation, despite the well-known fact that this is only an approximation for the true amount of inflation required to solve the horizon and flatness problems. The aim of this work is to show how this approximation can be completely avoided using an alternative framework for inflation model building. We show that using the inverse Hubble radius, H=aH , as the key dynamical parameter, the correct number of e-folding arises naturally as a measure of inflation. As an application, we present an interesting model in which the entire inflationary dynamics can be solved analytically and exactly, and, in special cases, reduces to the familiar class of power-law models.

Citation

Chongchitnan, S. (2016). Inflation model building with an accurate measure of e-folding. Physical Review D, 94(4), Article 043526. https://doi.org/10.1103/PhysRevD.94.043526

• Journal Article Type: Article
• Acceptance Date: Jun 18, 2016
• Online Publication Date: Aug 23, 2016
• Publication Date: Aug 23, 2016
• Deposit Date: Sep 20, 2016
• Publicly Available Date: Sep 20, 2016
• Journal: Physical review D
• Print ISSN: 2470-0010
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 94
• Issue: 4
• Article Number: 043526
• DOI: https://doi.org/10.1103/PhysRevD.94.043526
• Keywords: Inflation model building , e-folding, Horizon problem
• Public URL: https://hull-repository.worktribe.com/output/443232
• Publisher URL: http://journals.aps.org/prd/abstract/10.1103/PhysRevD.94.043526
• Additional Information: Authors' accepted manuscript of article published in: Physical review D, 2016, v.94, issue 4.
• Contract Date: Sep 20, 2016