Skip to main content
We gratefully acknowledge support from the Simons Foundation, member institutions, and all contributors. Donate
arXiv logo
Cornell University Logo

Astrophysics

arXiv:astro-ph/0612487 (astro-ph)
[Submitted on 18 Dec 2006 (v1), last revised 9 Oct 2007 (this version, v3)]

Title:Construction of Exact Solutions in Two-Fields Models and the Crossing of the Cosmological Constant Barrier

Authors:S.Yu. Vernov (Skobeltsyn Institute of Nuclear Physics, Moscow State University)
View PDF
Abstract: A dark energy model with a phantom scalar field, an usual scalar field and the string field theory inspired polynomial potential has been constructed. A two-parameter set of exact solutions to the Friedmann equations has been found. We have constructed such string inspired potential that some exact solutions correspond to the state parameter $w_{DE}>-1$ at large time, whereas other ones correspond to $w_{DE}<-1$ at large time. We demonstrate that the superpotential method is very effective to seek new exact solutions. We also present a two-fields model with a polynomial potential and the state parameter, which crosses the cosmological barrier infinitely often.
Comments: LaTeX, 18 pages, 3 figures, references added, accepted for publication in Theor. Math. Phys
Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th); Mathematical Physics (math-ph); Pattern Formation and Solitons (nlin.PS)
Cite as: arXiv:astro-ph/0612487
  (or arXiv:astro-ph/0612487v3 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0612487
Journal reference: Teor.Mat.Fiz. 155:47-61,2008; Theor.Math.Phys.155:544-556,2008
Related DOI: https://doi.org/10.1007/s11232-008-0045-4

Submission history

From: Sergey Yu. Vernov [view email]
[v1] Mon, 18 Dec 2006 20:19:03 UTC (54 KB)
[v2] Sat, 10 Feb 2007 10:41:44 UTC (68 KB)
[v3] Tue, 9 Oct 2007 12:36:40 UTC (62 KB)
Full-text links:

Access Paper:

  • View PDF
  • TeX Source
  • Other Formats
view license
Current browse context:
astro-ph
< prev   |   next >
new | recent | 2006-12

References & Citations

export BibTeX citation

Bookmark

BibSonomy logo Reddit logo

Bibliographic and Citation Tools

Bibliographic Explorer (What is the Explorer?)
Connected Papers (What is Connected Papers?)
Litmaps (What is Litmaps?)
scite Smart Citations (What are Smart Citations?)

Code, Data and Media Associated with this Article

alphaXiv (What is alphaXiv?)
CatalyzeX Code Finder for Papers (What is CatalyzeX?)
DagsHub (What is DagsHub?)
Gotit.pub (What is GotitPub?)
Hugging Face (What is Huggingface?)
Papers with Code (What is Papers with Code?)
ScienceCast (What is ScienceCast?)

Demos

Replicate (What is Replicate?)
Hugging Face Spaces (What is Spaces?)
TXYZ.AI (What is TXYZ.AI?)

Recommenders and Search Tools

Influence Flower (What are Influence Flowers?)
CORE Recommender (What is CORE?)
IArxiv Recommender (What is IArxiv?)

arXivLabs: experimental projects with community collaborators

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.

Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)