Mimicking the LCDM model with Stealths

TL;DR

This paper introduces a new cosmological model using stealth fields that replicate the Lambda Cold Dark Matter model's behavior without directly coupling to gravity, revealing how such fields influence cosmic evolution.

Contribution

It develops the simplest stealth field model that mimics the LCDM cosmology, highlighting the role of self-interaction potential in cosmic evolution.

Findings

Stealth fields can reproduce LCDM cosmology without direct gravitational coupling.

The self-interaction potential of stealth fields determines cosmic evolution.

The simplest stealth model effectively mimics standard cosmological behavior.

Abstract

We present a new cosmological model that mimics the Lambda Cold Dark Matter by using a stealth field. This kind of field is characterized as not coupling directly to gravity; however, it is connected to the underlying matter content of the universe model. As is known, stealth fields do not back-react on the space-time; however, their mimicry skills show how this field and its self-interaction potential determines the cosmic evolution. We show the study of the simplest model that can be developed with the stealth field.