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Seminar: ‘Cosmological Magnetic Fields from Ultralight Dark Matter’
March 5 | 15:00 - 17:00
Title: Cosmological Magnetic Fields from Ultralight Dark Matter
Speaker: Robert Brandenberger (McGill)
Venue&Time: Red Room / 15:00
Abstract: A coherently oscillating ultralight dark matter field which couples to electromagnetism in the same way as an axion induces a tachyonic instability which leads to the generation of cosmological magnetic fields immediately after the time of recombination. The mechanism also opens up channels which can facilitate the formation of supermassive black holes.