Speaker
Axel Brandenburg
(Stockholm University, Nordita)
Description
The primordial magnetic field can be traced in an evolutionary diagram of comoving magnetic field strength versus comoving length scale, where it follows a characteristic path. Relating the start- and endpoints to each other is an important theoretical accomplishment. At the same time, observational constraints in radio and gamma ray frequencies begin to narrow down the allowed parameter space in this evolutionary diagram. I will highlight several of the theoretical and observational discoveries that make primordial magnetic fields and gravitational waves powerful probes of the first microseconds of the universe, when important beyond standard model physics processes have occurred.