98 citations · 717 across the 39 of their papers we have counts for
17 papers · 1 filter
Recovering the geometry of a flat spacetime from background radiation
Francesco Bonsante, Catherine Meusburger, Jean-Marc Schlenker
We consider globally hyperbolic flat spacetimes in 2+1 and 3+1 dimensions, in which a uniform light signal is emitted on the -level surface of the cosmological time for …
Gauge fixing in (2+1)-gravity with vanishing cosmological constant
Catherine Meusburger, Torsten Schönfeld
We apply Dirac's gauge fixing procedure to (2+1)-gravity with vanishing cosmological constant. For general gauge fixing conditions based on two point particles, this yields explici…
q-Deformation of Lorentzian spin foam models
Winston J. Fairbairn, Catherine Meusburger
We construct and analyse a quantum deformation of the Lorentzian EPRL model. The model is based on the representation theory of the quantum Lorentz group with real deformation para…
Quantum deformation of two four-dimensional spin foam models
Winston J. Fairbairn, Catherine Meusburger
We construct the q-deformed version of two four-dimensional spin foam models, the Euclidean and Lorentzian versions of the EPRL model. The q-deformed models are based on the repres…
Gauge fixing in (2+1)-gravity: Dirac bracket and spacetime geometry
Catherine Meusburger, Torsten Schönfeld
We consider (2+1)-gravity with vanishing cosmological constant as a constrained dynamical system. By applying Dirac's gauge fixing procedure, we implement the constraints and deter…
Combinatorial quantisation of the Euclidean torus universe
C. Meusburger, K. Noui
We quantise the Euclidean torus universe via a combinatorial quantisation formalism based on its formulation as a Chern-Simons gauge theory and on the representation theory of the…