arXiv:2412.12200v1 Announce Type: new
Abstract: This paper aims to study a newly proposed fluid description of dark energy in the context of late-time accelerated expansion of the universe. We examine the probable origin of the proposed equation of state in correspondence with some vastly discussed scalar field models of dark energy and reconstruct the field parameters like scalar field $phi$ and scalar potential $V(phi)$, analyzing their behavior in the evolution of the universe. The study also incorporates an analysis of fundamental energy conditions: Null Energy Condition (NEC), Dominant Energy Condition (DEC), and Strong Energy Condition (SEC), to assess the physical consistency and cosmological implications of the model. We perform a detailed stability analysis and investigate the evolutionary dynamics of the proposed fluid model from a thermodynamic perspective. Additionally, the model is analyzed using some of the latest observational datasets, such as Cosmic Chronometers (CC), Baryon Acoustic Oscillation (BAO), and Supernova Type-Ia (using Pantheon+SH0ES compilation and Union 2.1), to determine its viability and consistency with observations. The results suggest that the model offers a robust description of dark energy dynamics while maintaining agreement with current observational data.
A Roadmap for Understanding Dark Energy Dynamics
Dark energy, a mysterious form of energy believed to be responsible for the late-time accelerated expansion of the universe, continues to intrigue scientists. In this paper, we propose a new fluid description of dark energy and aim to explore its origins, behavior, and implications. This roadmap will guide readers through the key findings and potential challenges on the horizon.
Understanding the Equation of State and Scalar Field Models
We begin by investigating the equation of state of the proposed fluid and its connection to scalar field models of dark energy. By examining the behavior of the scalar field $phi$ and scalar potential $V(phi)$, we can gain insights into the evolution of the universe. This analysis helps us establish a foundation for our subsequent investigations.
Assessing Energy Conditions and Cosmological Implications
Next, we delve into the physical consistency and cosmological implications of the proposed fluid model by analyzing fundamental energy conditions. We evaluate the Null Energy Condition (NEC), Dominant Energy Condition (DEC), and Strong Energy Condition (SEC). This assessment allows us to gauge the viability and validity of the model, providing valuable insights into its overall consistency.
Stability Analysis and Thermodynamic Perspectives
A detailed stability analysis is then performed to assess the dynamics of the proposed fluid model. By considering thermodynamic perspectives, we gain a deeper understanding of its evolution. This analysis is crucial in determining the robustness and reliability of the model as a description of dark energy dynamics.
Observational Dataset Analysis and Viability
We further evaluate the proposed fluid model’s viability by comparing it with the latest observational datasets. By analyzing data from Cosmic Chronometers (CC), Baryon Acoustic Oscillation (BAO), and Supernova Type-Ia (using Pantheon+SH0ES compilation and Union 2.1), we aim to establish its consistency with observations. These comparisons provide crucial evidence and support for the model.
Conclusion
The findings of our study suggest that the proposed fluid model offers a robust description of dark energy dynamics while maintaining agreement with current observational data. By examining its equation of state, scalar field models, energy conditions, stability, and thermodynamic perspectives, we have gained valuable insights into its origins, behavior, and implications. Our analysis using observational datasets further strengthens its viability. However, future challenges and opportunities lie in refining and expanding this model, incorporating additional observations and testing it against new data to solidify its position in our understanding of dark energy.