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Entropy Bounds and Dark Energy

by: Stephen D. H. Hsu
Physics Letters B, Vol. 594, No. 1-2. (5 May 2004), pp. 13-16, doi:10.1016/j.physletb.2004.05.020  Key: citeulike:12046205

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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 $∼ 10^-10 eV^4$, 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.


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