Scale Factor Dependent Equations of State for Curvature Inspired Dark Energy, Phantom Barrier and Late Cosmic Acceleration
Aug, 2006Citations per year
Abstract: (Elsevier)
Here, it is found that dark energy and dark matter emerge from the gravitational sector, if non-linear term of scalar curvature is added to Einstein–Hilbert Lagrangian. An equation of state for dark energy, having the form pde=−ρde+f(a) (with pde (ρde) being the pressure (density) for dark energy, f(a) being a function of scale factor a(t) and t being the cosmic time) is explored. Interestingly, this equation of state leads to a phantom barrier wde=pde/ρde=−1 at a=aw . It is found that when a- 98.80.Cq
- dark energy
- dark matter
- equation of state
- phantom
- gravitation
- derivative: high
- expansion: acceleration
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