University of Cambridge > > Cosmology Lunch > Inflation from Magnetic Drift

Inflation from Magnetic Drift

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Camille Bonvin.

I will describe a new, generic mechanism for realizing a period of slowly-rolling inflation through the use of an analog of ‘magnetic drift.’ I will focus on a particular realization of this mechanism – Chromo-Natural Inflation – which consists of an axion coupled to non-Abelian gauge fields. The model’s novel requirement is that the gauge fields begin inflation with a rotationally invariant vacuum expectation value (VEV) that is preserved through identification of SU(2) gauge invariance with rotations in three dimensions. The gauge VEV interacts with the axion leading to an attractor solution that exhibits slow-roll inflation even when the axion potential is steep. I will show that the background gauge fields mediate parity-violating interactions in the action for the fluctuations leading to gravitational waves with a preferred handedness.

This talk is part of the Cosmology Lunch series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.


© 2006-2024, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity