Comment on Ricci dark energy in Chern-Simons modified gravity
Yun Soo Myung
TL;DR
This paper analyzes Ricci dark energy within Chern-Simons modified gravity, finding that the Chern-Simons term's influence is minimal and the model behaves similarly to the modified Chaplygin gas near a de Sitter universe.
Contribution
It clarifies the role of Chern-Simons modifications in Ricci dark energy models and compares their cosmological evolution to other dark energy models.
Findings
Chern-Simons term's effect is suppressed in cosmological evolution.
Model resembles modified Chaplygin gas near de Sitter universe.
Different past evolution compared to other models.
Abstract
We revisit Ricci dark energy in Chern-Simons modified gravity. As far as the cosmological evolution, this is nothing but the Ricci dark energy with a minimally coupled scalar without potential which means that the role of Chern-Simons term is suppressed. Using the equation of state parameter, this model is similar to the modified Chaplygin gas model only when two are around the de Sitter universe deriving by the cosmological constant in the future. However, two past evolutions are different.
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