A critique of holographic dark energy

被引：44

作者：

Colgain, Eoin O. ^{[1
,2
]}

Sheikh-Jabbari, M. M. ^{[3
]}

机构：

[1] Sogang Univ, Ctr Quantum Spacetime, Seoul 121742, South Korea

[2] Sogang Univ, Dept Phys, Seoul 121742, South Korea

[3] Inst Res Fundamental Sci IPM, Sch Phys, POB 19395-5531, Tehran, Iran

来源：

CLASSICAL AND QUANTUM GRAVITY | 2021年 / 38卷 / 17期

基金：

新加坡国家研究基金会;

关键词：

holography; dark energy; turning point; MODEL;

D O I：

10.1088/1361-6382/ac1504

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Observations restrict the parameter space of holographic dark energy (HDE) so that a turning point in the Hubble parameter H(z) is inevitable. Concretely, cosmic microwave background, baryon acoustic oscillations and type Ia supernovae (SNE) data put the turning point in the future, but removing SNE results in an observational turning point at positive redshift. From the perspective of theory, not only does the turning point violate the null energy condition, but as we argue, it may be interpreted as an evolution of the Hubble constant H (0) with redshift, which is at odds with the very FLRW framework within which data has been analysed. Tellingly, neither of these are problems for the flat Lambda CDM model, and a direct comparison of fits further disfavours HDE relative to flat Lambda CDM.

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