Quintessence Cosmology with Coupled Real Scalar Field
GAO Chang-Jun1,2, SHEN You-Gen1,2,3,4
1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
2National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
4Shanghai United Center for Astrophysics, Shanghai 200234
Quintessence Cosmology with Coupled Real Scalar Field
GAO Chang-Jun1,2;SHEN You-Gen1,2,3,4
1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
2National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
4Shanghai United Center for Astrophysics, Shanghai 200234
Abstract： In the light of the recent observations of type Ia supernovae (SNe Ia) suggesting an accelerating Universe, we show the possibility of a coupled real scalar field to be quintessence for the source of the accelerating Universe. We derive the main equations which govern the evolution of the Universe and rewrite them with the observable quantities. Finally we point out very briefly how future observations may determine the equation of state of quintessence.
(Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.))
2002, Vol. 19 
