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

Understand

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.