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Entropy 2012, 14(8), 1578-1605; doi:10.3390/e14081578

Stability of Accelerating Cosmology in Two Scalar-Tensor Theory: Little Rip versus de Sitter

Department of Physics, Nagoya University, Nagoya 464-8602, Japan
Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya 464-8602, Japan
Instituciò Catalana de Recerca i Estudis Avançats (ICREA) and Institut de Ciencies de l’Espai (IEEC-CSIC), Campus UAB, Facultat de Ciencies, Torre C5-Par-2a pl, E-08193 Bellaterra (Barcelona), Spain
Tomsk State Pedagogical University, 634041, Tomsk, Russia
Author to whom correspondence should be addressed.
Received: 21 July 2012 / Revised: 14 August 2012 / Accepted: 16 August 2012 / Published: 23 August 2012
(This article belongs to the Special Issue Modified Gravity: From Black Holes Entropy to Current Cosmology)
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We develop the general reconstruction scheme in two scalar model. The quintom-like theory which may describe (different) non-singular Little Rip or de Sitter cosmology is reconstructed. The number of scalar phantom dark energy models (with Little Rip cosmology or asymptotically de Sitter evolution) is presented. Stability issue of such dark energy cosmologies as well as the flow to fixed points are studied. The stability of Little Rip universe which leads to dissolution of bound objects sometime in future indicates that no classical transition to de Sitter space occurs. The possibility of unification of inflation with Little Rip dark energy in two scalar theory is briefly mentioned.
Keywords: dark energy; scalar tensor theory; little rip dark energy; scalar tensor theory; little rip
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Ito, Y.; Nojiri, S.; Odintsov, S.D. Stability of Accelerating Cosmology in Two Scalar-Tensor Theory: Little Rip versus de Sitter. Entropy 2012, 14, 1578-1605.

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