tachyon暗能量的参数化及其势能函数的构造  

Parametrization of tachyon dark energy and its potential

作　　者：曹洪敏[1] 林宣滨[1] 王蕾[1] 赵文[1] 

机构地区：[1]中国科学技术大学天体物理中心,安徽合肥230026

出　　处：《中国科学技术大学学报》2007年第1期77-81,共5页JUSTC

基　　金：教育部优秀青年教师资助计划资助

摘　　要：利用暗能量的物态方程ω(z),得到了构造tachyon场势能函数的基本方程.然后对常用的4种物态方程的参数化模型分别计算了tachyon场的势能函数.由这4种模型所得到的势能函数均是单调的,并且在低红移时具有相同的渐近行为.The basic equations for reconstructing the potential of tachyon were derived from the equation of state of the dark energy ωφ（z）. The shapes of the potentials of the tachyon field were numerically reproduced for four typical parametrized models and some discussions on the results were given. In particular, for these four models, the potentials are all monotonous and possess the same asymptotic behavior at low redshift.

关 键 词：物态方程 tachyon场 参数化模型 

分 类 号：P159.3[天文地球—天文学]