Joint HET-DARK-DISCOVERY Seminar – Niels Bohr Institute - University of Copenhagen

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Speaker: Federico Urban, University of British Columbia
Title: The QCD nature of Dark Energy, signatures and applications

Abstract: 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).