具有双重指数势的phantom宇宙学  

Phantom cosmologies with a double exponential potential

作　　者：孙昌波[1] 赵一斌[1] 孙珏岷[1] 

机构地区：[1]上海师范大学天体物理联合研究中心,上海200234

出　　处：《上海师范大学学报（自然科学版）》2005年第1期41-46,共6页Journal of Shanghai Normal University(Natural Sciences)

基　　金：国家自然科学基金(10473007).

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.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.

关 键 词：PHANTOM DE Sitter吸引子 异宿轨线 M理论 

分 类 号：P142[天文地球—天体物理]