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SUMMARY:Christopher Fewster (University of York)
DTSTART:20200525T140000Z
DTEND:20200525T145000Z
DTSTAMP:20260416T065204Z
UID:IML-SMR/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IML-SMR/1/">
 A nonlocal generalisation of Green hyperbolicity</a>\nby Christopher Fewst
 er (University of York) as part of Scattering\, microlocal analysis and re
 normalisation\n\n\nAbstract\nI describe how Bär's theory of Green hyperbo
 lic partial differential operators can be generalized to nonlocal operator
 s\, where the nonlocality is confined to a compact spacetime region. Opera
 tors of this type arise in some models of the interaction between a field 
 and a particle detector\, but they can also be used to model fields on non
 commutative spacetimes and "soft causality violation".\n\nIt is shown that
  the nonlocal Green hyperbolic operators enjoy (suitable generalizations o
 f) many of the properties of Green hyperbolic operators\; in particular\, 
 they can be used as the starting point for a quantum field theory on curve
 d spacetimes.\n\nThe talk describes work in progress with Rainer Verch (Le
 ipzig).\n
LOCATION:https://researchseminars.org/talk/IML-SMR/1/
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