2 papers
gr-qc2025
The Instability of the Critical Friedmann Spacetime at the Big Bang as an Alternative to Dark Energy
Christopher Alexander, Blake Temple, Zeke Vogler
We characterize the local instability of pressureless Friedmann spacetimes to radial perturbation at the Big Bang. The analysis is based on a formulation of the Einstein-Euler equa…
gr-qc2024
Cosmic Accelerations Characterize the Instability of the Critical Friedmann Spacetime
Christopher Alexander, Blake Temple, Zeke Vogler
We give a definitive characterization of the instability of the pressureless () critical () Friedmann spacetime to smooth radial perturbations. We use this to characteriz…