标题： 修改的全息暗能量在DGP膜宇宙中 显示英文标题

标题： Modified holographic dark energy in DGP brane world

摘要： 在本文中，研究了一种由考虑高维黑洞质量作为紫外截断的紫外/红外对偶性导出的修正全息暗能量在达维-加巴达泽-波拉蒂（DGP）膜宇宙模型中的宇宙学动力学。我们分别选择哈勃视界和未来事件视界作为红外截断。同时考虑了DGP模型的两个分支。当哈勃视界作为红外截断时，修正的全息暗能量（HDE）表现得像一种有效暗能量，纯DGP膜宇宙模型中的引力修改作用，并且可以在$\epsilon=-1$分支中加速宇宙的膨胀，而在纯DGP模型中该分支不能经历加速阶段。当未来事件视界作为红外截断时，修正HDE的状态方程参数可以穿越奇异物质分界。 显示英文摘要

摘要： In this paper, the cosmological dynamics of a modified holographic dark energy which is derived from the UV/IR duality by considering the black hole mass in higher dimensions as UV cutoff, is investigated in Dvali-Gabadaze-Porrati (DGP) brane world model. We choose Hubble horizon and future event horizon as IR cutoff respectively. And the two branches of the DGP model are both taken into account. When Hubble horizon is considered as IR cutoff, the modified holographic dark energy (HDE) behaves like an effect dark energy that modification of gravity in pure DGP brane world model acts and it can drive the expansion of the universe speed up at late time in $\epsilon=-1$ branch which in pure DGP model can not undergo an accelerating phase. When future event horizon acts as IR cutoff, the equation of state parameter of the modified HDE can cross the phantom divide.