2020/12/24 by Muhammad Zahid Mughal, Iftikhar Ahmad, Mughal, Muhammad Zahid +1 · 1 citation
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Solar and Space Plasma Dynamics
paper · pdf · doi:10.48550/arxiv.2012.13429
openalex publication_date 2020/12/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate a multi-field model of dark energy in this paper. We develop a\nmodel of dark energy with two multiple scalar fields, one we consider, is a\nmultifield tachyon and the other is multi-field phantom tachyon scalars. We\nmake an analysis of the system in phase space by considering inverse square\npotentials suitable for these models. Through the development of an autonomous\ndynamical system, the critical points and their stability analysis is\nperformed. It has been observed that these stable critical points are satisfied\nby power law solutions. Moving on towards the analysis we can predict the fate\nof the universe. A special feature of this model is that it affects the\nequation of state parameter w to alter from being it greater than negative one\nto be less than it during the evolutionary phase of the universe. Thus, its all\nabout the phantom divide which turns out to be decisive in the evolution of the\ncosmos in these models.\n