Little Rip cosmological models with time-dependent equation of state
I. Brevik, V. V. Obukhov, K. E. Osetrin, and A. V. Timoshkin
TL;DR
This paper investigates Little Rip cosmological models with a focus on conditions leading to rip singularities, analyzing time estimates and the influence of a time-dependent dark energy equation of state.
Contribution
It introduces conditions for Little Rip occurrence based on a time-dependent dark energy equation of state, extending previous models to include asymptotic approaches to de Sitter space.
Findings
Conditions for Little Rip in terms of model parameters
Estimated time before rip singularity occurs
Comparison between standard LR and de Sitter asymptotic models
Abstract
Specific dark energy models, leading to the Little Rip (LR) cosmology in the far future, are investigated. Conditions for the occurrence of LR in terms of the parameters present in the proposed equation of state for the dark energy cosmic fluid are studied. Estimates about the time needed before the occurrence of the rip singularity in the standard LR model and the model in which the universe approaches the de Sitter space-time asymptotically, are given.
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