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SUMMARY:Probing the Cosmic Information in Early and Late Universe Physics 
  - J. Richard Bond (CITA)
DTSTART:20120809T150000Z
DTEND:20120809T160000Z
UID:TALK39162@talks.cam.ac.uk
CONTACT:Paula younger
DESCRIPTION:The Universe is fundamentally quantum and statistical\, a many
 -paths/many-worlds random-field story that pervades all discussions in cos
 mic theory. This talk uses "Cosmic Information Theory and Analysis" (CITA)
  as a unifying theme to explore our ideas of how the Universe morphed from
  a smooth Hubble-patch within a vast and wild probability landscape into t
 he intricate evolving complexity of the cosmic web we observe. I will disc
 uss the information content of cosmic parameter measurements\, with applic
 ations to acceleration trajectories of late-inflation Dark Energy and of t
 he early-inflaton.  I will also talk about how we try to probe the two gre
 at entropy (Shannon information) generation epochs. The first\, from which
  almost all of the entropy of the universe is thought to arise\, is from p
 ost-inflation preheating through the "shock-in-times" of highly non-equili
 brium interacting fields. The second\, from which most of the entropy in e
 lectrons and baryons arises\, is from crashing density waves as nonlineari
 ties in the cosmic web grow hierarchically\, through the more conventional
  shocks (in-space). The impact on cluster observables of non-thermal clust
 er entropies\,  in dark matter\,  and in gas pressure and density clumping
  and in internal bulk flows\, will be used as an example of the latter. 
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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