On the internal consistency of holographic dark energy models (CROSBI ID 145993)
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Podaci o odgovornosti
Horvat, Raul
engleski
On the internal consistency of holographic dark energy models
Holographic dark energy (HDE) models, underpinned by an effective quantum field theory (QFT) with a manifest UV/IR connection, have become convincing candidates for providing an explanation of the dark energy in the universe. On the other hand, the maximum number of quantum states that a conventional QFT for a box of size L is capable of describing relates 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 cut-off, which cannot be chosen independently of the IR cut-off 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.
dark energy theory ; black holes ; cosmological constant experiments
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Podaci o izdanju
10 (22)
2008.
022
6
objavljeno
1475-7516
10.1088/1475-7516/2008/10/022