Tachyon fields with effects of quantum matter in an Anti-de Sitter Universe

TL;DR

This paper explores how quantum conformal matter and tachyon fields influence the structure and expansion properties of an Anti-de Sitter universe, including potential acceleration and energy condition fulfillment.

Contribution

It introduces a combined model of quantum effects and tachyon fields in AdS space, analyzing their impact on universe radius and acceleration possibilities.

Findings

Quantum effects and tachyon fields significantly alter AdS universe properties.

The model can produce an accelerated scale factor under certain conditions.

Energy conditions are examined within the proposed framework.

Abstract

We consider an Anti-de Sitter universe filled by quantum conformal matter with the contribution from the usual tachyon and a perfect fluid. The model represents the combination of a trace-anomaly annihilated and a tachyon driven Anti-de Sitter universe. The influence exerted by the quantum effects and by the tachyon on the AdS space is studied. The radius corresponding to this universe is calculated and the effect of the tachyon potential is discussed, in particular, concerning to the possibility to get an accelerated scale factor for the proposed model (implying an accelerated expansion of the AdS type of universe). Fulfillment of the cosmological energy conditions in the model is also investigated