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T: Fachverband Teilchenphysik

T 23: Andere Gebiete der Theorie

T 23.1: Vortrag

Freitag, 7. März 2008, 14:00–14:15, KGI-HS 1023

The smallness of the cosmological constant Λ — •Jürgen Brandes — D-76307 Karlsbad, Danziger Str. 65

"To explain the smallness of the cosmological constant is one of the most outstanding challenges in modern theoretical physics", because Λ_observed = 10⁻¹²² Λ_theoretical and "thus wrong by 122 orders of magnitude" [Bergström and Goobar].

One possible solution is given by the Robertson-Walker-Metric (RWM) since it describes two different scenarios: (a) Expansion of the universe together with creation of time and space at big bang, (b) expansion of a meta-galaxy similar to a dust-like star but within space and time. In this case the non-empty vacuum (quantum ether) exists before big bang and Λ_obs = Λ_theo(changed by big bang) - Λ_theo(before big bang). Such a difference can be arbitrarily small and even zero if Λ_theo does not change solving the main challenge of Λ_obs. In case (a) quantum ether is created during expansion and this means either Λ_obs or Λ_theo being no solution. Questions to be discussed: Observable universe possibly an expanding meta-galaxy [1] and Λ_theo changeable as needed following quintessence models?

[1] Contribution Fachverband DD 2008