2008/03/31 by S Wang, Shuang Wang, Yang Zhang +3 · 1 citation
Physics and Astronomy · #Baryon #Baryon acoustic oscillations #COSMIC cancer database #Cosmic background radiation #Cosmic microwave background #Cosmology and Gravitation Theories #Dark energy #Equation of state #Hubble's law #Noncommutative and Quantum Gravity Theories #Oscillation (cell signaling) #Particle physics theoretical and experimental studies #Supernova #astro-ph #gr-qc
paper · pdf · doi:10.1088/1475-7516/2008/10/037
published as JCAP0810:037,2008 · 23 Pages, 8 Figures, 1 Table, Accepted for Publication in JCAP
arxiv created 2008/10/07 · openalex publication_date 2008/10/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
This work is a comprehensive investigation of the Yang–Mills condensate (YMC) dark energy (DE) model, which is extended to include the three-loop quantum corrections. We study its cosmic evolution and the possibility of crossing the phantom divide w = −1, examine in detail the Hubble parameter H , the deceleration parameter q , the statefinder ( r , s ) diagnostic and the w − w ' diagnostic for the model without and with interaction, and compare our results with other DE models. Also, using the observational data for type Ia supernovae (SNIa), the shift parameter from the cosmic microwave background (CMB), and the baryon acoustic oscillation peak from large scale structures (LSS), we give the cosmological constraints on the three-loop YMC model. It is found that the model can solve the coincidence problem naturally, and its prediction of the aforementioned parameter is much closer to the ΛCDM (CDM: cold dark matter) model one than those from other dynamical DE models; the introduction of the matter–DE interaction will make the YMC model deviate from the ΛCDM model, and will give an equation of state crossing −1. Moreover, it is also found that, for fitting the latest SNIa data alone, the ΛCDM model is slightly better than the three-loop YMC model; but in fitting the combination of SNIa, CMB and LSS data, the three-loop YMC model performs better than the ΛCDM model.