中国物理B ›› 2006, Vol. 15 ›› Issue (10): 2465-2469.doi: 10.1088/1009-1963/15/10/046

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    

Dynamics of quintessential inflation

翟向华, 赵一斌   

  1. Shanghai United Center for Astrophysics, Shanghai Normal University, Shanghai, 200234, China
  • 收稿日期:2005-11-22 修回日期:2006-06-11 出版日期:2006-10-20 发布日期:2006-10-20
  • 基金资助:
    Project supported by the National Nature Science Foundation of China (Grant No 10473007) and the Shanghai Rising-Star Program (Grant No 02QA14033).

Dynamics of quintessential inflation

Zhai Xiang-Hua(翟向华)† and Zhao Yi-Bin(赵一斌)   

  1. Shanghai United Center for Astrophysics, Shanghai Normal University, Shanghai, 200234, China
  • Received:2005-11-22 Revised:2006-06-11 Online:2006-10-20 Published:2006-10-20
  • Supported by:
    Project supported by the National Nature Science Foundation of China (Grant No 10473007) and the Shanghai Rising-Star Program (Grant No 02QA14033).

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摘要： In this paper, we study a realistic model of quintessential inflation with radiation and matter. By the analysis of the dynamical system and numerical work about the evolution of the equation of state and cosmic density parameter, we show that this model is a good match for the current astronomical observation. The conclusion we obtain is in favour of the model where the modular part of the complex field plays the role of the inflaton whereas the argument part is the quintessence field. Numerical calculation shows that a heteroclinic orbit (solution of the dynamical system) is interpolated between early-time de Sitter phase (an unstable critical point) and a late-time de Sitter attractor.

Abstract: In this paper, we study a realistic model of quintessential inflation with radiation and matter. By the analysis of the dynamical system and numerical work about the evolution of the equation of state and cosmic density parameter, we show that this model is a good match for the current astronomical observation. The conclusion we obtain is in favour of the model where the modular part of the complex field plays the role of the inflaton whereas the argument part is the quintessence field. Numerical calculation shows that a heteroclinic orbit (solution of the dynamical system) is interpolated between early-time de Sitter phase (an unstable critical point) and a late-time de Sitter attractor.

Key words: dark energy, inflation, attractor

中图分类号:  (Dark energy)

  • 95.36.+x
98.70.Vc (Background radiations) 98.80.Ft (Origin, formation, and abundances of the elements)