355 citations · 963 across the 12 of their papers we have counts for
5 papers · 1 filter
-Minkowski space, scalar field, and the issue of Lorentz invariance
Laurent Freidel, Jerzy Kowalski-Glikman
We describe -Minkowski space and its relation to group theory. The group theoretical picture makes it possible to analyze the symmetries of this space. As an application of this…
A New Spin Foam Model for 4d Gravity
Laurent Freidel, Kirill Krasnov
Starting from Plebanski formulation of gravity as a constrained BF theory we propose a new spin foam model for 4d Riemannian quantum gravity that generalises the well-known Barrett…
Linearized dynamics from the 4-simplex Regge action
Bianca Dittrich, Laurent Freidel, Simone Speziale
We study the relation between the hessian matrix of the riemannian Reggae action on a 4-simplex and linearized quantum gravity. We give an explicit formula for the hessian as a fun…
Field theory on --Minkowski space revisited: Noether charges and breaking of Lorentz symmetry
L. Freidel, J. Kowalski-Glikman, S. Nowak
This paper is devoted to detailed investigations of free scalar field theory on -Minkowski space. After reviewing necessary mathematical tools we discuss in depth the Lagrangian…
The Relativistic Particle: Dirac observables and Feynman propagator
Laurent Freidel, Florian Girelli, Etera R. Livine
We analyze the algebra of Dirac observables of the relativistic particle in four space-time dimensions. We show that the position observables become non-commutative and the commuta…