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SUMMARY: Perturbation Theory and Beyond in Quantum Mechanics and Quantum F
 ield Theory - Marco Serone\, SISSA
DTSTART:20190220T141500Z
DTEND:20190220T151500Z
UID:TALK117028@talks.cam.ac.uk
CONTACT:Francesca Chadha-Day
DESCRIPTION:Perturbation theory is one of the fundamental tool to study \n
 Quantum Mechanics and Quantum Field Theory\, though it is known that the a
 ssociated power series in the expansion parameter is mathematically ill-de
 fined and not convergent in general.\nIn certain cases it turns out that t
 he series can be resummed to the exact result. After a brief review on old
  results\, I will focus on more recent developments that allowed us to ext
 end the class of theories where perturbation theory is resummable.
LOCATION:MR2\, Centre for Mathematical Sciences
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