Relatore
Prof.
Manolo Asorey
(Universidad de Zaragoza)
Descrizione
We will review some basic aspects of the covariant approach to
quantum mechanics in a framework free of ultraviolet singularities.
Some higher derivative field theories are also free of ultraviolet
singularities and ghosts. They seem to provide a safe
framework also for quantum field theories.
However, we point out that they undergo hidden pathologies and in spite
of the absence of ghosts most of these theories are not unitary.
Autore principale
Prof.
Manolo Asorey
(Universidad de Zaragoza)
