Unitary Issues in Some Higher Derivative Field Theories

Unitary Issues in Some Higher Derivative Field Theories

We analyze the unitarity properties of higher derivative quantum field theories which are free of ghosts and ultraviolet singularities. We point out that in spite of the absence of ghosts most of these theories are not unitary. This result confirms the difficulties of finding a consistent quantum fi...

Full description

Bibliographic Details
Main Authors: Manuel Asorey, Leslaw Rachwal, Ilya Shapiro
Format: Article
Language:English
Published: MDPI AG 2018-02-01
Series:Galaxies
Subjects:
quantum gravity
higher derivatives
non-local theories
unitarity
consistency conditions
Osterwalder-Schrader positivity
Kallen-Lehmann spectral representation
Online Access:http://www.mdpi.com/2075-4434/6/1/23

Internet

http://www.mdpi.com/2075-4434/6/1/23

Similar Items