BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Anisotropic gravitational wave background from preheating - Arttu 
 Rajantie (Imperial College London)
DTSTART:20130204T130000Z
DTEND:20130204T140000Z
UID:TALK42871@talks.cam.ac.uk
CONTACT:Camille Bonvin
DESCRIPTION:In many inflationary models\, the transition from inflation to
  radiation domination involves a period of "preheating"\, a parametric res
 onance which transfers energy rapidly away from the inflaton field. This i
 s known to generate a background of gravitational waves\, which may be det
 ectable by future detectors\, and there has been considerable activity in 
 calculating their spectrum using lattice field theory simulations. In this
  talk\, I will explain why the intensity of this gravitational wave backgr
 ound can actually be anisotropic on large angular scales on the sky. I pre
 sent numerical results for the massless preheating model\, showing that th
 e amplitude of this anisotropy can be of order one\, meaning that if the g
 ravitational wave background itself can be detected\, then its anisotropy 
 should also be easy to measure. This would provide a powerful way to probe
  observationally the dynamics of preheating\, and that way the microscopic
  physics behind inflation.
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
END:VEVENT
END:VCALENDAR