Submissions from Mari Saito

[1]  faKiv:2403.07245 [pdf]
Gravitational Waves from a post-inflationary inflationary regime
Comments: 10 pages, 5 figures, talk presented at the Summer Institute of Southern Cross University, Maynooth, Ireland, February 2018

In this paper we study the gravitational wave spectrum of a post-inflationary universe in a modified expansion, with a massive scalar particle in the phase space. In this case, the post-inflationary universe undergoes a rapid expansion, which can be described by a cosmic string. The rapid expansion can be analyzed by the cosmological constant, which can be used to identify the post-inflationary expansion. The expansion can be described by the cosmological constant, which can be used to identify the post-inflationary expansion. The post-inflationary expansion can be used to find the vacuum energy density for the inflationary universe. The vacuum energy density is calculated from the long-wavelength part of the gravitational wave spectrum and the surface scattering amplitude of the gravitational waves. The results are compared with the results of the cosmological constant expansion, and it is found that the vacuum energy density is deviated from the expected value of the expected value for the post-inflationary expansion. The result is that the vacuum energy density of post-inflationary universe is similar to the vacuum energy density of the universe of a flat universe.