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SUMMARY:Inflation from Magnetic Drift - Peter Adshead (DAMTP)
DTSTART:20140224T130000Z
DTEND:20140224T140000Z
UID:TALK50130@talks.cam.ac.uk
CONTACT:Camille Bonvin
DESCRIPTION:I will describe a new\,  generic mechanism for realizing a per
 iod of slowly-rolling inflation through the use of an analog of 'magnetic 
 drift.'  I will focus on a particular realization of this mechanism - Chro
 mo-Natural Inflation - which consists of an axion coupled to non-Abelian g
 auge fields. The model's novel requirement is that the gauge fields begin 
 inflation with a rotationally invariant vacuum expectation value (VEV) tha
 t is preserved through identification of SU(2) gauge invariance with rotat
 ions in three dimensions. The gauge VEV interacts with the axion leading t
 o an attractor solution that exhibits slow-roll inflation even when the ax
 ion potential is steep.  I will show that the background gauge fields medi
 ate parity-violating interactions in the action for the fluctuations leadi
 ng to gravitational waves with a preferred handedness.\n
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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