Cosmic evolution from phase transition of 3-dimensional flat space
Arjun Bagchi, Stephane Detournay, Daniel Grumiller, Joan Simon
TL;DR
This paper explores a new phase transition in 3D flat space cosmologies, showing how hot flat space can tunnel into a universe described by flat space cosmology, revealing novel thermodynamic behavior.
Contribution
It introduces a novel phase transition mechanism between flat space cosmologies and Minkowski vacuum in 3D gravity theories.
Findings
High-temperature flat space tunnels into flat space cosmology.
The phase transition occurs in Einstein and topologically massive gravity.
New thermodynamic properties of flat space cosmologies are identified.
Abstract
Flat space cosmology spacetimes are exact time-dependent solutions of 3-dimensional gravity theories, such as Einstein gravity or topologically massive gravity. We exhibit a novel kind of phase transition between these cosmological spacetimes and the Minkowski vacuum. At sufficiently high temperature (rotating) hot flat space tunnels into a universe described by flat space cosmology.
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