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arXiv 1207.0165astro-ph.COgr-qchep-phhep-th
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哈勃长度下的全息暗能量

Holographic dark energy described at the Hubble length

Iván Durán, Luca Parisi

摘要:

我们考虑全息宇宙学模型的暗能量,其中红外截止设置的哈勃半径。我们表明,任何相互作用的暗能量模型与物质一样,能够减轻符合问题(即,具有正相互作用项,而不管其详细形式如何)可以被重新铸造为非相互作用模型,其中全息参数随时间缓慢地演变。分析了两个具体案例。首先考虑了文献[1]中的相互作用模型,找到了相应的非相互作用模型,然后提出了一个新的非相互作用模型,给出了含时全息参量的具体表达式,并对其相应的相互作用模型进行了分析。我们使用观测数据来约束这两个模型的参数,并表明它们可以在微扰水平上区分开来。

英文摘要:

We consider holographic cosmological models of dark energy in which the infrared cutoff is set by the Hubble's radius. We show that any interacting dark energy model with a matter like term able to alleviate the coincidence problem (i.e., with a positive interaction term, regardless of its detailed form) can be recast as a noninteracting model in which the holographic parameter evolves slowly with time. Two specific cases are analyzed. First, the interacting model presented in [1] is considered, and its corresponding noninteracting version found. Then, a new noninteracting model, with a specific expression of the time-dependent holographic parameter, is proposed and analyzed along with its corresponding interacting version. We constrain the parameters of both models using observational data, and show that they can be told apart at the perturbative level.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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