scholarly journals CYCLIC COSMOLOGY FROM THE LITTLE RIP

2013 ◽  
Vol 28 (29) ◽  
pp. 1350125 ◽  
Author(s):  
PAUL H. FRAMPTON ◽  
KEVIN J. LUDWICK
Keyword(s):  
Big Rip

We revisit a cyclic cosmology scenario proposed in 2007 to examine whether its hypotheses can be sustained if the underlying big-rip evolution, which was assumed there, is replaced by the recently proposed little rip. We show that the separation into causal patches at turnaround is generally valid for a little rip, and therefore conclude that the little rip is equally as suitable a basis for cyclicity as is the big rip.

Universe can surf the Big Rip

Nature ◽  
2003 ◽  
Author(s):  
Philip Ball
Keyword(s):  
Big Rip

scholarly journals The quantum realm of the ``Little Sibling'' of the Big Rip singularity

2015 ◽  
Vol 2015 (11) ◽  
pp. 044-044 ◽  
Author(s):  
Imanol Albarran ◽  
Mariam Bouhmadi-López ◽  
Francisco Cabral ◽  
Prado Martín-Moruno
Keyword(s):  
Big Rip

Escaping the big rip?

2005 ◽  
Vol 2005 (05) ◽  
pp. 005-005 ◽  
Author(s):  
Mariam Bouhmadi-López ◽  
José A Jiménez Madrid
Keyword(s):  
Big Rip

scholarly journals Quantum cosmology of Eddington-Born–Infeld gravity fed by a scalar field: The big rip case

2019 ◽  
Vol 23 ◽  
pp. 100255 ◽  
Author(s):  
Imanol Albarran ◽  
Mariam Bouhmadi-López ◽  
Che-Yu Chen ◽  
Pisin Chen
Keyword(s):  
Scalar Field ◽  
Quantum Cosmology ◽  
Big Rip

scholarly journals Quantum behavior of the “Little Sibling” of the Big Rip induced by a three-form field

2018 ◽  
Vol 2018 (09) ◽  
pp. 031-031 ◽  
Author(s):  
Mariam Bouhmadi-López ◽  
David Brizuela ◽  
Iñaki Garay
Keyword(s):  
Big Rip ◽  
Quantum Behavior ◽  
Form Field

scholarly journals The little sibling of the big rip singularity

2015 ◽  
Vol 24 (10) ◽  
pp. 1550078 ◽  
Author(s):  
Mariam Bouhmadi-López ◽  
Ahmed Errahmani ◽  
Prado Martín-Moruno ◽  
Taoufik Ouali ◽  
Yaser Tavakoli
Keyword(s):  
Blow Up ◽  
Energy Condition ◽  
Cosmic Time ◽  
Energy Conditions ◽  
Accelerating Universe ◽  
Hubble Rate ◽  
Big Rip ◽  
The Status ◽  
The Universe ◽  
Nonlinear Energy

In this paper, we present a new cosmological event, which we named the little sibling of the big rip. This event is much smoother than the big rip singularity. When the little sibling of the big rip is reached, the Hubble rate and the scale factor blow up, but the cosmic derivative of the Hubble rate does not. This abrupt event takes place at an infinite cosmic time where the scalar curvature explodes. We show that a doomsday à la little sibling of the big rip is compatible with an accelerating universe, indeed at present it would mimic perfectly a ΛCDM scenario. It turns out that, even though the event seems to be harmless as it takes place in the infinite future, the bound structures in the universe would be unavoidably destroyed on a finite cosmic time from now. The model can be motivated by considering that the weak energy condition should not be strongly violated in our universe, and it could give us some hints about the status of recently formulated nonlinear energy conditions.

scholarly journals Exploring the deviation of cosmological constant by a generalized pressure parameterization

2019 ◽  
Vol 79 (10) ◽  
Author(s):  
Jun-Chao Wang ◽  
Xin-He Meng
Keyword(s):  
Hubble Constant ◽  
Scalar Fields ◽  
Parametric Model ◽  
Matter Density ◽  
Density Parameter ◽  
Present Value ◽  
Big Rip ◽  
Phantom Scalar ◽  
Ultimate Fate ◽  
The Universe

Abstract We bring forward a generalized pressure (GP) parameterization for dark energy to explore the evolution of the universe. This parametric model has covered three common pressure parameterization types and can be reconstructed as quintessence and phantom scalar fields, respectively. We adopt the cosmic chronometer (CC) datasets to constrain the parameters. The results show that the inferred late-universe parameters of the GP parameterization are (within $$1\sigma $$1σ): the present value of Hubble constant $$H_{0}=(72.30^{+1.26}_{-1.37}) \ \hbox {km s}^{-1}\hbox { Mpc}^{-1}$$H0=(72.30-1.37+1.26)kms-1Mpc-1; the matter density parameter $$\Omega _{\text {m0}}=0.302^{+0.046}_{-0.047}$$Ωm0=0.302-0.047+0.046, and the bias of the universe towards quintessence. Then we perform a dynamic analysis on the GP parameterization and find that there is an attractor or a saddle point in the system corresponding to the different values of the parameters. Finally, we discuss the ultimate fate of the universe under the phantom scenario in the GP parameterization. It is demonstrated that the three cases of pseudo rip, little rip, and big rip are all possible.

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