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SUMMARY:Locally covariant QFT and the problem of formulating the same phys
 ics in all spacetimes - Chris Fewster (University of York)
DTSTART:20111123T141500Z
DTEND:20111123T151500Z
UID:TALK34308@talks.cam.ac.uk
CONTACT:Pau Figueras
DESCRIPTION:Axiomatic approaches to QFT have traditionally been confined t
 o flat (or maximally symmetric) spacetimes\, or to the analysis of particu
 lar model theories. To go beyond this\, it is necessary to understand in g
 eneral what it means for a theory to represent the same underlying physics
  in different spacetimes\, without assuming the existence of a Lagrangian 
 description. Brunetti\, Fredenhagen and Verch (BFV) have proposed a framew
 ork for locally covariant QFT\, using category theory\, that generalizes t
 he axiomatic approach to general curved spacetimes. In this talk\, I will 
 review the BFV framework and examine the extent to which it succeeds in fo
 rmulating the same physics in all spacetimes. The talk is based on recent 
 papers written with Rainer Verch.
LOCATION:MR2\, Centre for Mathematical Sciences
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