Entropy Bounds and Dark Energy

2004/03/31 by Stephen D. H. Hsu · 2 citations
Physics and Astronomy · #hep-th #astro-ph #gr-qc #hep-ph

paper · pdf · doi:10.1016/j.physletb.2004.05.020

published as Phys.Lett.B594:13-16,2004 · 6 pages, Latex. Added discussion of non-cosmological limits on holographic dark energy. Version to appear in Physics Letters B

arxiv created 2004/05/05 · arxiv updated 2009/12/01

Abstract

Entropy bounds render quantum corrections to the cosmological constant Λ finite. Under certain assumptions, the natural value of Λ is of order the observed dark energy density ∼ 10^-10 \rm eV⁴, thereby resolving the cosmological constant problem. We note that the dark energy equation of state in these scenarios is w ≡ p / ρ= 0 over cosmological distances, and is strongly disfavored by observational data. Alternatively, Λ in these scenarios might account for the diffuse dark matter component of the cosmological energy density.

Cited by

• Observational Constraints and Cosmological Dynamics of Interacting Fractional Holographic Dark Energy in Light of DESI DR2
• Stephen Hsu [wikipedia]