Joint HET-DARK-DISCOVERY Seminar
Federico Urban (University of British Columbia)
The QCD nature of Dark Energy, signatures and applications
The origin of the observed dark energy could be explained entirely within the standard model, with no new fields required. I will review the ideas underlying the appearance of the Veneziano ghost of low-energy QCD and show how nontrivial spacetimes (compact topologies and time-dependent background) give rise to interesting new effects such as Casimir energies and gravitational production of unphysical states. I will then discuss the cosmological applications of such effects (dark energy, generation of primordial magnetic fields).
Date: Thursday, 14/1/10
Place: Auditorium D, Blegdamsvej 17, 2100, Copenhagen