论文标题
Renyi熵和平坦时空中的全息暗能
Renyi entropy and the holographic dark energy in flat space time
论文作者
论文摘要
基于Renyi熵,我们研究了在空间平坦的FLRW宇宙中明显范围内的全息暗能量(HDE)模型的熵校正版本。应用广义熵导致弗里德曼演化方程的修改版本,除了无压力物质和HDE之外,还有一个纯粹的几何术语。这个额外的术语被认为是暗能量的另一部分。我们假设宇宙是由理想流体(例如暗物质和全息暗能量)的非相互作用组成部分所填充的。总深色能是广义HDE和几何部分的组合,其密度参数通过减少红移来接近一个参数。考虑到宇宙的状态参数和减速参数的总方程,这表明宇宙可以保持正加速膨胀阶段,该阶段显示了与观察数据一致的一致,仅对于常数$ζ$的特定值。
Based on Renyi entropy, we study the entropy corrected version of the holographic dark energy (HDE) model in apparent horizon of spatially flat FLRW universe. Applying the generalized entropy leads to the modified version of the Friedmann evolution equations which besides pressure-less matter and HDE, there is an extra term that is purely geometric. This extra term are assumed as another part of dark energy. We assume the universe is filled by non-interacting components of ideal fluids such as dark matter and holographic dark energy. The total dark energy, which is a combination of generalized HDE and geometric part, has a density parameter that approaches one by decreasing the redshift. Considering the total equation of state parameter and deceleration parameter of the universe indicates that the universe could stays in positive accelerated expansion phase that shows an agreement with observational data, only for the specific values of the constant $ζ$.