Scalar-Field Model for Dark Energy with a Fixed Background Vector Field

LI Yan-Heng

Chinese Physics C> 2006, Vol. 30> Issue(6) : 522-525

Scalar-Field Model for Dark Energy with a Fixed Background Vector Field

LI Yan-Heng ^,

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, ChinaGraduate University of Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
We propose a dark energy model with single dynamical scalar field and fixed background vector field, in which the parameter w can cross －1 during the evolution of the universe. It is found that in certain cases w can cross －1 and transition from decelerating to accelerating occur at z≈0.2 and z≈1.7 respectively, which is consistent with the observations.

References

[1]

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LI Yan-Heng. Scalar-Field Model for Dark Energy with a Fixed Background Vector Field[J]. Chinese Physics C, 2006, 30(6): 522-525.

LI Yan-Heng. Scalar-Field Model for Dark Energy with a Fixed Background Vector Field[J]. Chinese Physics C, 2006, 30(6): 522-525. shu

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Received: 2005-11-21
Revised: 2005-12-23

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沈阳化工大学材料科学与工程学院沈阳 110142

Scalar-Field Model for Dark Energy with a Fixed Background Vector Field

LI Yan-Heng ^,

Corresponding author: LI Yan-Heng,

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, ChinaGraduate University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2005-11-21
Accepted Date: 2005-12-23
Available Online: 2006-06-05

Abstract: We propose a dark energy model with single dynamical scalar field and fixed background vector field, in which the parameter w can cross －1 during the evolution of the universe. It is found that in certain cases w can cross －1 and transition from decelerating to accelerating occur at z≈0.2 and z≈1.7 respectively, which is consistent with the observations.