PYESSENCE - Generalised Coupled Quintessence Linear Perturbation Python Code - User Guide

TL;DR

PYESSENCE is an open-source Python package that models linear perturbations in generalized coupled quintessence cosmological models, supporting multiple dark matter fluids and scalar fields, with practical examples included.

Contribution

This paper provides a comprehensive user guide for PYESSENCE, a versatile tool for evolving linear perturbations in complex dark energy and dark matter models.

Findings

Supports arbitrary number of CDM fluids and DE scalar fields

Includes example use cases demonstrating functionality

Allows for exotic dark matter with non-zero equation of state

Abstract

This paper is a guide to the installation and use of the Python package PYESSENCE. PYESSENCE is designed to evolve linear perturbations to Coupled Quintessence models with a arbitrary number of cold dark matter (CDM) fluids and dark energy (DE) scalar fields as dictated by a given model. The equations are sufficiently general to allow for more exotic dark matter with a non-zero equation of state. Several example uses are included in order to demonstrate typical functionality to the potential user. PYESSENCE is released under an open source modified BSD license and is available on Bitbucket.