【摘要】 利用相空间分析方法,系统研究了具有双重指数势的phantom动力学.主要目的在于研究由M理论引起的势,但同时还分析了指数势中系数比为正的所有可能情况.根据宇宙的晚期行为,给出了解的完整分类.与quintessence情形相反,该体系存在异宿轨线解.更多还原

【Abstract】 Using phase space methods, the phantom dynamics of the double exponential potential are systematically analyzed. E-ven if the major objective is in potential arising from M- theory, one has not limited himself to study all possible positive ratios of the coefficients in the exponential. The complete classification of solutions are given according to their late-time behavior. Especially , a heteroclinic solution which is an orbit connecting two different critical points in contrast with the case of quintessence.更多还原