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SUMMARY:Nonlinear dynamics of flux compactification - Max Corman (Perimete
 r)
DTSTART:20210514T120000Z
DTEND:20210514T130000Z
UID:TALK157729@talks.cam.ac.uk
CONTACT:Justin Ripley
DESCRIPTION:We study the nonlinear evolution of unstable flux compactifica
 tions\, applying\nnumerical relativity techniques to solve the Einstein eq
 uations in D\ndimensions coupled to a q-form field and positive cosmologic
 al constant.  We\nshow that initially homogeneous flux compactifications a
 re unstable to\ndynamically forming warped compactifications.  In some cas
 es\, we find that the\nwarping process can serve as a toy-model of slow-ro
 ll inflation\, while in other\ninstances\, we find solutions that eventual
 ly evolve to a singular state. \nAnalogous to dynamical black hole horizon
 s\, we use the geometric properties of marginally\ntrapped surfaces to cha
 racterize the lower dimensional vacua in the\ninhomogeneous and dynamical 
 settings we consider.  We find that\nlower-dimensional vacua with a lower 
 expansion rate are dynamically favoured\,\nand in some cases find spacetim
 es that undergo a period of accelerated\nexpansion followed by contraction
 . 
LOCATION:Zoom
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