Observe the open universe in the sky?
Hong-Guang Zhang, Jie Ren, Xin-He Meng

TL;DR
This paper explores the observable implications of landscape theories predicting an open universe with negative curvature if inflation lasts more than 62 e-foldings, analyzing how background curvature affects observable e-foldings and discussing recent related research.
Contribution
It introduces a new perspective on how non-flat backgrounds suppress observable e-foldings and connects this to landscape predictions of an open universe.
Findings
Observable e-foldings are suppressed by background curvature.
Landscape models predict an open universe with negative curvature for N>62.
Recent work supports the link between curvature and inflation duration.
Abstract
We first review the related works on the observable consequence of landscape and the regulation of e-foldings during inflation. We focus on a branch of observable consequence of landscape which predicts an open universe with negative curvature if e-foldings . After discussing the observable regulation from the aspect by Kaloper, Kleban and Sorbo, we make an argument that in the non-flat background the observable is suppressed by a factor . We point out that this seems to detect the information where e-foldings possibly. Finally, we discuss our outcomes with the recent work by Arkani-Hamed et al.
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Taxonomy
TopicsCosmology and Gravitation Theories · Galaxies: Formation, Evolution, Phenomena · Gamma-ray bursts and supernovae
