[seminar] Serija predavanja - I. Shapiro, 27. & 28. ozujka, IRB, I krilo, 11-13 sati

[Larisa Jonke]

  INSTITUT "Ruder Boskovic"
  ZAVOD ZA TEORIJSKU FIZIKU
  Bijenicka c. 54, Zagreb, Hrvatska
 
 
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                  SEMINAR TEORIJSKE  FIZIKE
    (Zajednicki seminari Zavoda za fiziku PMF-a i
         Zavoda za teorijsku fiziku  IRB-a)
 
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 Ilya L. Shapiro,  Universidade federal de Juiz de Fora, MG, Brazil

  
 odrzat ce SERIJU PREDAVANJA  pod naslovom
 
  
"Quantum Gravity from the Quantum Field Theory Perspective"

 
    Datumi: 27. i 28. ozujka 2013 (srijeda i cetvrtak)
    Vrijeme: 11:00-13:00
    Mjesto: IRB, predavaonica I krila
 
 
    Sazetak:
 
A short introductory and review course in perturbative Quantum Gravity. We
describe the
Lagrangian quantization and sketch the standard demonstration of
diffeomorphism invariant
renormalizability of the theory.
The analysis of power counting shows that there are possibilities for
non-renormalizable,
renormalizable and super- renormalizable models of Quantum Gravity, but in
the last two
cases we meet a problem of unphysical massive ghosts and unitarity of
S-matrix for gravitons. Possible solutions of this problem are discussed,
including some related to the effective approach to Quantum Field Theory
(QFT). Alternative possibilities include various versions
(in general, very different) of induced gravity and also treating Quantum
Gravity as effective
QFT at low energies. Some critical considerations concerning the last case
are given.

Bibliography:
I.L. Buchbinder, S.D. Odintsov, I.Shapiro, Effective Action in Quantum
Gravity (1992), IOPP.
I.Shapiro, Class. Quant. Grav. 25 (2008) 103001 (Topical review);
arxiv:0801.0216.
 
   

 Voditeljica seminara:
    Larisa Jonke (larisa at irb.hr)