Waiting for Inflation: A New Initial State for the Universe

Understand

We propose a cosmological lingering phase for the initial state prior to inflation which would help address the singularity problem of inflation.

• The universe begins with a constant (Hagedorn) temperature and then transitions into an inflationary universe while preserving the Null Energy Condition (NEC).
• In such a universe time is presumably emergent, calling the age of the universe into question.
• We first consider the phase space of positive spatial curvature models within General Relativity and with matter sources that respect the NEC.