Holographic Dark Energy from a Polynomial Expansion in the Hubble Parameter

2025/10/29 by Cruz, Miguel, Housset, Joaquin, Lepe, Samuel +2
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc)

paper · doi:10.48550/arxiv.2510.25928

Abstract

This work investigates a generalized holographic dark energy (HDE) model defined by a polynomial expansion in the Hubble parameter, incorporating the first three leading terms proportional to H², H⁴, and H⁶ through a variable parameter in the expression for the energy density. The analysis is developed within the framework of a spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) Universe composed of non-interacting matter and this HDE fluid. We derive the complete set of Friedmann equations to study the cosmic evolution and subsequently examine the system for the existence of thermodynamic P-V type phase transitions. Finally, a comprehensive comparison with the predictions of the standard ΛCDM model is presented.

Citations

• Different faces of generalized holographic dark energy
• <i>Planck</i> 2018 results

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