4.6 Article

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

Journal

ENTROPY
Volume 14, Issue 8, Pages 1578-1605

Publisher

MDPI
DOI: 10.3390/e14081578

Keywords

dark energy; scalar tensor theory; little rip

Funding

  1. MEC (Spain) [FIS2006-02842]
  2. AGAUR (Catalonia) [2009SGR-994]
  3. Ministry of Education, Culture, Sports, Science Technology [G07]
  4. JSPS [22224003, 23540296]
  5. Grants-in-Aid for Scientific Research [22224003, 23540296] Funding Source: KAKEN
  6. ICREA Funding Source: Custom

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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.

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