论文标题
与哈勃大小的截止
A note on interacting holographic dark energy with a Hubble-scale cutoff
论文作者
论文摘要
Hubble半径作为红外截止的全息暗能量已被认为是解释晚期宇宙加速的候选者，并且可以解决巧合问题。在这种情况下，只有在暗能和冷暗物质之间存在相互作用的情况下，才有可能的状态方程。在本文中，假定了一组现象学相互作用，并对耦合常数的可能值进行了详细分析，但是所产生的物质功率谱和宇宙微波背景温度和极化功率光谱具有远离观察到的形状。这些结果排除了自由参数的任何值，似乎表明，当考虑到宇宙学数据时，假定的与哈勃大小的截止的相互作用的全息暗能不可解释宇宙的加速扩张。
Holographic dark energy with the Hubble radius as infrared cutoff has been considered as a candidate to explain the late-time cosmic acceleration and it can solve the coincidence problem. In this scenario, a non-zero equation of state is only possible if there is an interaction between dark energy and cold dark matter. In this paper, a set of phenomenological interactions is assumed and a detailed analysis of the possible values of the coupling constants is carried out, however the resulting matter power spectrum and cosmic microwave background temperature and polarization power spectra have a shape very far from the observed ones. These results rule out any value for the free parameters and it seems to indicate that the assumed interacting holographic dark energy with a Hubble-scale cutoff is not viable to explain the accelerated expansion of the Universe, when cosmological data are taken into account.
