Frans KLINKHAMER
Karlsruher Institut für Technologie, Allemagne
A brief introduction to the notorious « cosmological constant problem » is given. Then, a particular approach is discussed, which has been developed by Volovik and the present speaker over the last years and which goes under the name of q-theory. This talk will be aimed at a non-expert audience, skipping most technicalities. The q-theory approach provides a possible solution of the main cosmological constant problem, why is Λ1/4 negligible compared to the energy scales of the electroweak standard model (not to mention the Planck energy)? But, as always, many questions remain.