Standard Cosmology on the Anti-de Sitter boundary

Abstract

The well-known brane world model of cosmology is an alternative to the standard model of cosmology, called ΛCDM (Lambda Cold Dark Matter) model. However, the quadratical energy density of the brane universe requires an undesirable fine tuning. The paper develops a new Anti-de Sitter (AdS) brane world model without the quadratical energy density by using a second Einstein equation, which arises canonically during a holographic renormalisation. On the AdS boundary it is demonstrated that this brane model equals an effective de Sitter ΛCDM model, whereas the brane model near the AdS boundary agrees to the ΛCDM model except the earliest times. Finally, it is shown that the coincidence problem is avoided and the cosmological constant problem, if not solved, is greatly reduced.

References in corpus (3)

• Tensions between the Early and the Late Universe
• Holographic renormalization and supersymmetry
• Limits on Brane-World and Particle Dark Radiation from Big Bang Nucleosynthesis and the CMB

Cited by in corpus (1)

• Influence of pressure anisotropy and non-metricity parameter on mass-radius relation and stability of millisecond pulsar in $f(Q)$ gravity