BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Second order effects of isocurvature initial conditions - Pedro Mi
 guel Gregorio Carrilho (Queen Mary University) 
DTSTART:20191014T120000Z
DTEND:20191014T130000Z
UID:TALK131530@talks.cam.ac.uk
CONTACT:Sadra Jazayeri
DESCRIPTION:Observations have offered strong support for the theory of inf
 lation\, but many details of the physics of the early Universe are still u
 nknown. An observation of primordial isocurvature modes would change our v
 iew of the early Universe and point towards multi-field inflation. In this
  talk\, I will describe some recent work towards the calculation of second
 -order effects from isocurvature modes\, including the magnetic field gene
 rated by vortical currents and the intrinsic bispectrum of the CMB. I will
  show the effects of general isocurvature modes to be small for both obser
 vables\, but that a large enhancement is found for compensated isocurvatur
 e modes\, given their large potential amplitude. The sensitivity of these 
 second-order effects to this compensated mode allows us to severely constr
 ain its amplitude using the non-observation of the predicted bispectrum.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
END:VEVENT
END:VCALENDAR