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New agegraphic dark energy as a rolling tachyon

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【作者】 崔晶磊张莉张敬飞张鑫

【Author】 Cui Jing-Lei, Zhang Li, Zhang Jing-Fei, and Zhang Xin Department of Physics, College of Sciences, Northeastern University, Shenyang 110004, China

【机构】 Department of Physics,College of Sciences,Northeastern University

【摘要】 Combining the general relativity and the uncertainty relation in quantum mechanics, the energy density of quantum fluctuations of space-time can be viewed as dark energy. The so-called agegraphic dark energy model is just based on this viewpoint, in which the age of the universe is introduced as the length measure. Recently, the new agegraphic dark energy model was proposed, where the dynamical dark energy is measured by the conformal age of the universe. On the other hand, scalar-field dark energy models like tachyons are often regarded as an effective description of some underlying theory of dark energy. In this paper, we show that the new agegraphic dark energy can be described completely by a tachyon scalar-field. We thus reconstruct the potential and the dynamics of the tachyon scalar-field, according to the evolution of the new agegraphic dark energy.

【Abstract】 Combining the general relativity and the uncertainty relation in quantum mechanics, the energy density of quantum fluctuations of space-time can be viewed as dark energy. The so-called agegraphic dark energy model is just based on this viewpoint, in which the age of the universe is introduced as the length measure. Recently, the new agegraphic dark energy model was proposed, where the dynamical dark energy is measured by the conformal age of the universe. On the other hand, scalar-field dark energy models like tachyons are often regarded as an effective description of some underlying theory of dark energy. In this paper, we show that the new agegraphic dark energy can be described completely by a tachyon scalar-field. We thus reconstruct the potential and the dynamics of the tachyon scalar-field, according to the evolution of the new agegraphic dark energy.

【基金】 Project supported by the National Natural Science Foundation of China (Grant No. 10705041)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2010年01期
  • 【分类号】P145.9
  • 【被引频次】1
  • 【下载频次】36
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