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Unifying dark energy and dark matter with the modified Ricci model

  • Linsen Zhang
  • Puxun Wu
  • Hongwei Yu
Regular Article - Theoretical Physics

Abstract

In this paper, two modified Ricci models are considered as the candidates of unified dark matter–dark energy. In model one, the energy density is given by \(\rho_{\mathrm{MR}}=3M_{\mathrm{pl}}(\alpha H^{2}+\beta\dot{H})\), whereas, in model two, by \(\rho_{\mathrm{MR}}=3M_{\mathrm{pl}}(\frac{\alpha}{6} R+\gamma\ddot{H}H^{-1})\). We find that they can explain both dark matter and dark energy successfully. A constant equation of state of dark energy is obtained in model one, which means that it gives the same background evolution as the wCDM model, while model two can give an evolutionary equation of state of dark energy with the phantom divide line crossing in the near past.

Keywords

Dark Matter Dark Energy Dark Energy Model Holographic Dark Energy High Derivative Term 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2011

Authors and Affiliations

  1. 1.Department of Physics and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationHunan Normal UniversityChangshaChina
  2. 2.College of ScienceWuhan Textile UniversityWuhanChina

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