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SUMMARY:Gravitational Waves from Reheating and Phase Transitions after Inf
 lation - Daniel Figueroa (Helsinki)
DTSTART:20101115T130000Z
DTEND:20101115T140000Z
UID:TALK23648@talks.cam.ac.uk
CONTACT:Tasos Avgoustidis
DESCRIPTION:Between the end of  Inflation and primordial nucleosynthesis\,
  the Universe\ngoes through non-linear\, non-perturbative and out-of-equil
 ibrium stages\, like\nReheating or Phase Transitions (PhT). In particular\
 , the spatial distribution\nof the fields develops inhomogeneities during 
 these complicated periods\,\nproducing Gravitational Waves (GW) copiously.
  This seminar will thus be\ndevoted to the details of the generation of su
 ch primordial GW backgrounds\,\nstudying global and gauge scenarios of Reh
 eating and PhT's\, and considering\nboth sub- and super-horizon scales. GW
  decouple upon production and propagate\nunimpeded carrying invaluable inf
 ormation about the high energy process that\ngenerated them. Therefore\, t
 he detection of this gravitational radiation would\nopen a new observation
 al window into the very early Universe. Moreover\, these\nGW backgrounds m
 ay easily have a much greater amplitude than the GW\nbackground expected f
 rom Inflation (and might even mimic the spectrum of the\nlatter)\, so a co
 rrect understanding of them seems timely.
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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