New agegraphic dark energy as a rolling tachyon

doi:10.1088/1674-1056/19/1/019802

中国物理B ›› 2010, Vol. 19 ›› Issue (1): 19802-019802.doi: 10.1088/1674-1056/19/1/019802

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇下一篇

New agegraphic dark energy as a rolling tachyon

崔晶磊, 张莉, 张敬飞, 张鑫

Department of Physics, College of Sciences, Northeastern University, Shenyang 110004, China

收稿日期:2009-04-09 修回日期:2009-05-05 出版日期:2010-01-15 发布日期:2010-01-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10705041).

New agegraphic dark energy as a rolling tachyon

Cui Jing-Lei(崔晶磊),Zhang Li(张莉), Zhang Jing-Fei(张敬飞), and Zhang Xin(张鑫)

Department of Physics, College of Sciences, Northeastern University, Shenyang 110004, China

Received:2009-04-09 Revised:2009-05-05 Online:2010-01-15 Published:2010-01-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10705041).

摘要/Abstract

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.

Key words: new agegraphic dark energy, tachyon, reconstruction

中图分类号: (Dark energy)

95.36.+x

04.20.Gz (Spacetime topology, causal structure, spinor structure) 14.80.-j (Other particles (including hypothetical)) 95.30.Cq (Elementary particle processes) 95.30.Sf (Relativity and gravitation) 98.80.Cq (Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.))

崔晶磊, 张莉, 张敬飞, 张鑫. New agegraphic dark energy as a rolling tachyon[J]. 中国物理B, 2010, 19(1): 19802-019802.

Cui Jing-Lei(崔晶磊),Zhang Li(张莉), Zhang Jing-Fei(张敬飞), and Zhang Xin(张鑫) . New agegraphic dark energy as a rolling tachyon[J]. Chin. Phys. B, 2010, 19(1): 19802-019802.

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New agegraphic dark energy as a rolling tachyon

New agegraphic dark energy as a rolling tachyon

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