标题： 暗物质宇宙的未来命运及来自减速度参数的模型约束 显示英文标题

标题： Future Destiny of Quintessential Universe and Constraint on Model from Deceleration Parameter

摘要： 暗能量在宇宙不同阶段，即辐射主导、物质主导和暗能量主导阶段的演化，与宇宙的跟踪行为和减速参数密切相关。 我们给出了物质-暗能量相等时期暗能量的状态方程与暗能量势能的逆幂指数之间的显式关系，得到了来自当前减速参数的该势能参数的约束，即低逆幂指数。 我们指出，具有单一项的低逆幂律势能无法实现跟踪解。 为了同时具备跟踪解和合适的减速参数，有必要在暗能量势能中引入至少两项。 我们给出了暗能量宇宙的未来演化。 显示英文摘要

摘要： The evolution of the quintessence in various stages of the universe, the radiation-, matter-, and quintessence-dominated, is closely related with the tracking behavior and the deceleration parameter of the universe. We gave the explicit relation between the equation-of-state of the quintessence in the epoch of the matter-quintessence equality and the inverse power index of the quintessence potential, obtained the constraint on this potential parameter come from the present deceleration parameter, i.e., a low inverse power index. We point out that the low inverse power-law potential with a single term can not work for the tracking solution. In order to have both of the tracker and the suitable deceleration parameter it is necessary to introduce at least two terms in the quintessence potential. We give the future evolution of the quintessential universe.