全息暗能量模型的内在一致性
On Internal Consistency of Holographic Dark Energy Models
摘要：
全息暗能量（HDE）模型以有效量子场论（QFT）为基础，具有明显的紫外/红外联系，已成为宇宙中暗能量的令人信服的候选者。另一方面，在尺寸为$L$的盒子中，常规QFT能够描述的量子态的最大数量是指那些处于突然坍缩为黑洞边缘的盒子。量子场论的另一个限制是，紫外截止不能独立于红外截止而被选择，因此在宇宙学环境中成为时间的函数，即使在暗能量占主导地位的宇宙学时期之前，紫外截止也应该保持最大的能量尺度。我们表明，无论一个处理的饱和形式的HDE或采取一定程度的非饱和在过去，上述限制不能满足在辐射主导的宇宙，宇宙的历史中的一个时代，预计将在传统的量子场论是完美的描述。
英文摘要：
Holographic dark energy (HDE) models, underlain by an effective quantum field theory (QFT) with a manifest UV/IR connection, have become a convincing candidate for the dark energy in the universe. On the other hand, the maximum number of quantum states a conventional QFT in the box of size $L$ is capable to describe, refer to those boxes which are on the brink of experiencing a sudden collapse to a black hole. Another restriction on the underlying QFT is that the UV cutoff, which cannot be chosen independently of the IR cutoff and therefore becomes a function of time in a cosmological setting, should stay the largest energy scale even in the standard cosmological epochs preceding a dark energy dominated one. We show that, irrespective of whether one deals with the saturated form of HDE or takes a certain degree of non-saturation in the past, the above restrictions cannot be met in a radiation-dominated universe, an epoch in the history of the universe which is expected to be perfectly describable within conventional QFT.
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