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

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

    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

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.

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