De Sitter Bounces
H. Lu, J.F. Vazquez-Poritz, John E. Wang
TL;DR
This paper constructs smooth, time-dependent bouncing solutions in Einstein-Maxwell de Sitter gravity, which can be extended to higher-dimensional M-theory contexts, revealing new dynamical behaviors of de Sitter space.
Contribution
It introduces a method to generate non-singular, bouncing de Sitter solutions via analytic continuation of instantons, extending to M-theory in higher dimensions.
Findings
De Sitter bounces smoothly connect two de Sitter phases.
Solutions can be lifted to non-singular M-theory configurations.
Multiple stages of evolution are identified in these solutions.
Abstract
By analytically continuing recently-found instantons, we construct time-dependent solutions of Einstein-Maxwell de Sitter gravity which smoothly bounce between two de Sitter phases. These deformations of de Sitter space undergo several stages in their time evolution. Four and five-dimensional de Sitter bounces can be lifted to non-singular time-dependent solutions of M-theory.
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