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SUMMARY:de Sitter\, anti de Sitter and all that
DTSTART:20240429T140000
DTEND:20240429T150000
DTSTAMP:20260916T182553Z
UID:f5cd88e7259ad2c10338651dc0731a9420dc283a5de074f4e62bb984
CATEGORIES:Conferences - Seminars
DESCRIPTION:Ugo Moschella\nAfter a short historical introduction on the fa
 mous Einstein-de Sitter debate I present a general approach to de Sitter a
 nd anti de Sitter Quantum Field Theory based on the analyticity properties
  of the correlation functions which are closely similar to the ones which 
 are equivalent to  the positivity of the spectrum of the hamiltonian in e
 very Lorentz frame Minkowski QFT  (that is\, the spectral condition). In 
 this context I present an important family of plane waves well adapted to 
 the de Sitter geometry and discuss the harmonic analysis of propagators in
  terms of them. Applications include the Kallen-Lehmann representations an
 d 1-loop and two-loop calculations in the dimensional regularization in bo
 th the de Sitter and the anti de Sitter cases.
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727
STATUS:CONFIRMED
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