标题： 暗能量与大撕裂奇点的非最小引力耦合 显示英文标题

标题： Non-minimal Gravitational Coupling of Phantom and Big Rip Singularity

摘要： 我们考虑了一个完美流体物质系统与几何的非最小耦合，其中耦合函数被取为里奇标量的任意函数。 由于这种耦合，物质应力张量不再守恒，并且两个组分之间存在能量传递。 通过求解守恒方程并应用热力学第二定律，我们表明能量传递的方向取决于物质流体的状态方程。 特别是，幻影流体在宇宙膨胀时应该失去能量。 这种能量减少可以避免宇宙以宇宙末日结束。 显示英文摘要

摘要： We consider a non-minimal coupling of a perfect fluid matter system with geometry, which the coupling function is taken to be an arbitrary function of the Ricci scalar. Due to such a coupling, the matter stress tensor is no longer conserved and there is an energy transfer between the two components. By solving the conservation equation and applying the second law of thermodynamics, we show that direction of the energy transfer depends on the equation of state of the matter fluid. In particular, a phantom fluid should loose energy with expansion of the universe. This energy reduction can avoid the universe to end with a cosmic doomsday.