Universe bouncing its way to inflation

Author:

Kaur Manjeet1ORCID,Nandi Debottam1,Choudhury Debajyoti1,Seshadri T. R.1

Affiliation:

1. Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India

Abstract

Cosmological models with inflation and those with bounce have their own strengths and weaknesses. Here, we construct a model in which a phase of bounce is followed by a viable inflationary phase. This incorporates several advantages of both and hence, is a more viable model for cosmic evolution. We explore scenarios wherein the bouncing phase smoothly transits to an inflationary one, with the pivot scale leaving the Hubble horizon during the latter era, thereby maintaining consistency with observations. Staying within the ambit of Einstein–Hilbert gravity augmented by the inflation, we ensure a pre-inflationary bounce by introducing a second scalar field that helps engineer the requisite violation of the null energy condition. Potential ghost instabilities can be mitigated by invoking a nontrivial coupling between the two scalar fields.

Funder

DST-INSPIRE

IoE, University of Delhi

Publisher

World Scientific Pub Co Pte Ltd

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Unifying inflationary and reheating solution;Journal of Cosmology and Astroparticle Physics;2024-05-01

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