2012-11-26

Speaker: Tomohiro Fujita (Kavli IPMU)

Title: Inflationary Magnetogenesis

Abstract: Recently, very large scale magnetic fields are observed in void regions.
Since they are thought to be a key to solve the long outstanding problem
of galactic/galaxy cluster magnetic fields, they gather attentions from both
theorists and observationalists. Although their strength and size are
roughly fixed by observation, their origin is a big mystery. Thus it gives us a
good motivation to build inflationary models of "magnetogenesis".
I will briefly review magnetogenesis models from inflation,
show that all preceding models are not viable (as long as I know)
and discuss the remaining possiblity of model building.