50 citations · 205 across the 13 of their papers we have counts for
13 papers
Non-Perturbative -matrix Renormalization
Laurent Freidel, José Padua-Argüelles, Susanne Schander +1
We propose a renormalization group flow equation for a functional that generates -matrix elements and which captures similarities to the well-known Wetterich and Polchinski equa…
Gauge Symmetry Breaking Lattice Regularizations and their Continuum Limit
Thorsten Lang, Susanne Schander
Lattice regularizations are pivotal in the non-perturbative quantization of gauge field theories. Wilson's proposal to employ group-valued link fields simplifies the regularization…
Quantum Geometrodynamics Revived II. Hilbert Space of Positive Definite Metrics
Thorsten Lang, Susanne Schander
This paper represents the second in a series of works aimed at reinvigorating the quantum geometrodynamics program. Our approach introduces a lattice regularization of the hypersur…
Quantum Geometrodynamics Revived I. Classical Constraint Algebra
Thorsten Lang, Susanne Schander
In this series of papers, we present a set of methods to revive quantum geometrodynamics which encountered numerous mathematical and conceptual challenges in its original form prom…
Lorentzian quantum cosmology goes simplicial
Bianca Dittrich, Steffen Gielen, Susanne Schander
We employ the methods of discrete (Lorentzian) Regge calculus for analysing Lorentzian quantum cosmology models with a special focus on discrete analogues of the no-boundary propos…
Backreaction in Cosmology
S. Schander, T. Thiemann
In this review, we investigate the question of backreaction in different approaches to cosmological perturbation theory, and with a special focus on quantum theoretical aspects. By…