The way to the Big Bang

TL;DR

This paper introduces a conformal invariance framework for cosmological particle creation, proposing the Big Bang as a light-speed detonation wave from quantum vacuum, emphasizing causality and the universe's openness.

Contribution

It presents a novel model linking conformal invariance to particle creation, reinterpreting the Big Bang as a propagating wave from quantum vacuum with causal implications.

Findings

Particles are created on the light cone, maintaining causal connection.

The model favors an open universe ($k=0, -1$).

The Big Bang is modeled as a detonation wave at light speed.

Abstract

We propose conformal invariance as a fundamental symmetry governing cosmological particle creation from vacuum fluctuations, employing a phenomenological approach with an ideal fluid action to address the long-standing back-reaction problem. We demonstrate that particle production cannot emerge from classical vacua but must originate from a quantum vacuum at zero scale factor, with the transition surface constituting a light-like rather than space-like hypersurface. This implies that particles are created on the light cone and remain causally connected, with their apparent simultaneity being illusory. Our model requires an open Universe ($k=0, -1$) and reconceptualizes the Big Bang as a detonation wave propagating through quantum vacuum at the speed of light.