具有对称性的tachyon场作为暗能量

Dark energy served by Tachyon field with symmetrical property

本文我们主要研究具有对称性taclhyon场作为暗能量的情况。对tachyon场,我们提出了SO(2)和SO(1,1)暗能量模型,此两个模型均包含两个场量,从而将tachyon模型推广到了双场。我们还推导出这两种模型中相应的tachyon场的运动方程、能量密度ρ_T、压强P_T以及态方程能数ω_T的表达式,并讨论了态方程参数的取值范围。

Astronomical observation indicates that two thirds of cosmic density is dark energy. Here, dark energy served by Tachyon. field with symmetrical property is studied. As for Tachyon field, two models are estblished： SO （2） and SO （1,1）,containing two fields, within the two models,the Tachyon field＇s motion equation,energy density ρT ,pressure intensity Pr,and the parameter wT. of the expression for equation of state are deduced. The parametre＇s value is discussed.