Title: Cosmic Dynamics with Quintessence as Dark Energy Model
Abstract: Various models of dark energy have been proposed to explain cosmic acceleration. Quintessence is one of dark energy models in the form of a scalar field. With its Lagrangian that takes a form of kinetic component and its potential, it is possible for this scalar field to drive late-time cosmic acceleration.
In this work, cosmic dynamics with the presence of a quintessence has been derived. I will start by reviewing about phase plane analysis of a model with exponential potential. After that, cosmic dynamics for the case of non-exponential potential is derived. In the case of non-exponential potential, there will be a tracker solution that attract other trajectories to a common evolutionary path.
In addition, I will discuss about reconstruction of quintessence from observations, starting from reconstruction of the field potential, to the evolution of its equation of state. I will also review about statefinder parameters (Sahni et al., 2003) that can be used to distinguish any dark energy models from cosmological constant. Finally, (w_ϕ,w'_ϕ) plane as a classification of quintessence models is discussed.
Keywords: quintessence, exponential potential, tracker solution, evolution of equation of state
Publication Year: 2015
Publication Date: 2015-02-27
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot