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SUMMARY:Chronology Protection for the Galileon and Massive Gravity - Clare
  Burrage (University of Geneva/Nottingham University)
DTSTART:20111128T130000Z
DTEND:20111128T140000Z
UID:TALK32647@talks.cam.ac.uk
CONTACT:Dr Sebastien Renaux-Petel
DESCRIPTION:The Galileon model has proved of great interest to the study o
 f both inflation and the late time accelerated expansion of the universe. 
  The model is also closely connected to new\, and ghost free\, theories of
  massive gravity.  It is potentially worrying\, however\, that superlumina
 l fluctuations are quite generic in these models\, and it has been specula
 ted that such superluminal fluctuations could be used to build closed time
 -like curves.\nGeneral relativity contains a mechanism\, known as the Hawk
 ing Chronology Protection Conjecture\, which prevents the formation of clo
 sed time-like curves.  I will review how this occurs\, and show that the m
 echanism can be extended to theories\, such as the Galileon\, which have m
 ore than one effective metric and superluminal fluctuations.
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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