Quantum deSitter cosmology and phantom matter

TL;DR

This paper explores a unified model of deSitter universe driven by quantum conformal field theory and phantom matter, showing it facilitates easier cosmic acceleration and reveals unique properties like anti-gravitating solutions.

Contribution

It introduces a combined model of trace-anomaly driven inflation and phantom matter, highlighting the effective role of phantom scalar as a quantum field theory analogue.

Findings

Easier achievement of accelerated expansion in the unified model

Presence of anti-gravitating solutions and negative ADM mass Nariai solutions

Connection with steady state cosmology

Abstract

We consider deSitter universe and Nariai universe induced by quantum CFT with classical phantom matter and perfect fluid. The model represents the combination of trace-anomaly driven inflation and phantom driven deSitter universe. The similarity of phantom matter with quantum CFT indicates that phantom scalar may be the effective description for some quantum field theory. It is demonstrated that it is easier to achieve the acceleration of the scale factor preserving the energy conditions in such unified model. Some properties of unified theory (anti-gravitating solutions, negative ADM mass Nariai solution, relation with steady state) are briefly mentioned.