Quasi-Rip: A New Type of Rip Model without Cosmic Doomsday

Abstract

The fate of our universe is an unceasing topic of cosmology and the human being. The discovery of the current accelerated expansion of the universe significantly changed our view of the fate of the universe. Recently, some interesting scenarios concerning the fate of the universe attracted much attention in the community, namely the so-called "Little Rip" and "Pseudo-Rip". It is worth noting that all the Big Rip, Little Rip and Pseudo-Rip arise from the assumption that the dark energy density $\rho (a)$ is monotonically increasing. In the present work, we are interested to investigate what will happen if this assumption is broken, and then propose a so-called "Quasi-Rip" scenario, which is driven by a type of quintom dark energy. In this work, we consider an explicit model of Quasi-Rip in detail. We show that Quasi-Rip has an unique feature different from Big Rip, Little Rip and Pseudo-Rip. Our universe has a chance to be rebuilt from the ashes after the terrible rip. This might be the last hope in the "hopeless" rip.

9 pages, 2 figures, 1 table, revtex4; v2: discussions added, Phys. Rev. D in press; v3: published version

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Cited by in corpus (14)

• Viscous Cosmology for Early- and Late-Time Universe
• Characteristic Properties of Two Different Viscous Cosmology Models for the Future Universe
• Dark Energy Coupled with Dark Matter in Viscous Fluid Cosmology
• Recent advances in cosmological singularities
• Bounce Universe Induced by an Inhomogeneous Dark Fluid Coupled with Dark Matter
• Archimedean-type force in a cosmic dark fluid: III. Big Rip, Little Rip and Cyclic solutions
• Dissipative Universe-Inflation with Soft Singularity
• Investigating the physical and geometrical parameters of the cosmological models with anisotropic background
• Inhomogeneous Dark Fluid and Dark Matter, Leading to a Bounce Cosmology
• Dark energy and dark matter perturbations in singular universes
• New perspectives on future rip scenarios with holographic dark energy
• Little Rip, Pseudo Rip and bounce cosmology with generalized equation of state in non-standard backgrounds
• Holographic bounce cosmological models induced by viscous dark fluid from a generalized non-singular entropy function
• Self-interaction in a cosmic dark fluid: The four-kernel rheological extension of the equations of state