上海大学学报（英文版）
上海大學學報（英文版）
상해대학학보（영문판）
JOURNAL OF SHANGHAI UNIVERSITY (ENGLISH EDITION)
2008年
5期
405-409
,共5页
周建华%陆惠卿%方伟%魏晨星
週建華%陸惠卿%方偉%魏晨星
주건화%륙혜경%방위%위신성
dark energy%phantom non-linear Born-Infeld (NLBI) type scalar field%phantom linear scalar field (LSF)
This paper studies phantom linear scalar field (LSF) and phantom non-linear Born-Infeld (NLBI) scalar field with square potential of the form V(φ) =1/2 m2φ2. The equation of state parameter w(z), and evolution of scale factor a(t) in both phantom LSF and phantom NLBI scalar model are explored. The age of universe Hot and the transition redshift Z are obtained. The Gold data set of 157-SN-Ia is used to constrain parameters of the two models by numerical calculation. The phantom LSF is slightly better than the phantom NLBI type scalar field model for a large m. Although a smaller m corresponding to a slower rolling of field φ better fits the observation data, the difference between phantom NLBI scalar field and phantom LSF is not distinct in this case.
