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Dimensional Regularization in Position Space, and a Forest Formula for Epstein-Glaser Renormalization
Michael Duetsch, Klaus Fredenhagen, Kai Johannes Keller +1
We reformulate dimensional regularization as a regularization method in position space and show that it can be used to give a closed expression for the renormalized time-ordered pr…
Quantum field theory on curved spacetime and the standard cosmological model
Klaus Fredenhagen, Thomas-Paul Hack
The aim of this review is to outline a full route from the fundamental principles of algebraic quantum field theory on curved spacetime in its present-day form to explicit phenomen…
"Vacuum-like" Hadamard states for quantum fields on curved spacetimes
Marcos Brum, Klaus Fredenhagen
We present a modification of the recently proposed Sorkin-Johnston states for scalar free quantum fields on a class of globally hyperbolic spacetimes possessing compact Cauchy hype…
Construction of KMS States in Perturbative QFT and Renormalized Hamiltonian Dynamics
Klaus Fredenhagen, Falk Lindner
We present a general construction of KMS states in the framework of perturbative algebraic quantum field theory (pAQFT). Our approach may be understood as an extension of the Schwi…
Quantum gravity from the point of view of locally covariant quantum field theory
Romeo Brunetti, Klaus Fredenhagen, Katarzyna Rejzner
We construct perturbative quantum gravity in a generally covariant way. In particular our construction is background independent. It is based on the locally covariant approach to q…