# Dynamics of coupled phantom and tachyon fields

## TL;DR

This paper analyzes the dynamics of coupled phantom and tachyon fields with specific potentials and couplings, exploring their phase space behavior and late-time acceleration, but finds they do not solve the coincidence problem.

## Contribution

It provides a detailed phase space analysis of coupled phantom and tachyon fields with particular potentials and couplings, highlighting their stability and acceleration properties.

## Key findings

- Coupled phantom fields can have stable late-time acceleration.
- The examined couplings do not resolve the coincidence problem.
- Coupled tachyon fields with inverse square potential exhibit specific dynamical behaviors.

## Abstract

In this paper, we apply the dynamical analysis to a coupled phantom field with scaling potential taking particular forms of the coupling (linear and combination of linear), and present phase space analysis. We investigate if there exist late time accelerated scaling attractor that has the ratio of dark energy and dark matter densities of the order one. We observe that the scrutinized couplings cannot alleviate the coincidence problem, however acquire stable late time accelerated solutions. We also discuss coupled tachyon field with inverse square potential assuming linear coupling.