ETD system

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Tesi etd-01112019-102721


Thesis type
Tesi di dottorato di ricerca
Author
PIVA, MARCO
URN
etd-01112019-102721
Title
From Lee-Wick Models to Quantum Gravity, Fakeons and the Violation of Microcausality
Settore scientifico disciplinare
FIS/02
Corso di studi
FISICA
Commissione
tutor Prof. Anselmi, Damiano
Parole chiave
  • Quantum Gravity
  • Fakeons
  • Renormalization
  • Lee-Wick models
Data inizio appello
09/01/2019;
Consultabilità
completa
Riassunto analitico
Study of the mathematical aspects of Lee-Wick quantum field theories and their relation with quantum gravity. In particular, it is proved that the models satisfy perturbative unitarity. The proof is achieved by reformulating them as nonanalytically Wick rotated Euclidean theories. From these results, a unique, renormalizable and unitary theory of quantum gravity is identified by means of a novel quantization procedure, named “fakeon prescription”. The new model of gravitational interactions is studied in its theoretical and phenomenological aspects. The model is compared with other quantum gravity theories, pointing out their physical difference.
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