120 citations · 607 across the 31 of their papers we have counts for
4 papers · 1 filter
Algorithmic approach to Cosmological Coherent State Expectation Values in LQG
Klaus Liegener, Łukasz Rudnicki
In the lattice approach to Loop Quantum Gravity on a fixed graph computations tend to be involved and are rarely analytically manageable. But, when interested in the expectation va…
Symmetry restriction and its application to gravity
Wojciech Kamiński, Klaus Liegener
In the Hamiltonian formulation, it is not a priori clear whether a symmetric configuration will keep its symmetry during evolution. In this paper, we give precise requirements of w…
Hamiltonian Renormalisation V: Free Vector Bosons
Klaus Liegener, Thomas Thiemann
In a recent proposal we applied methods from constructive QFT to derive a Hamiltonian Renormalisation Group in order to employ it ultimately for canonical quantum gravity. The prop…
Effective LQC model for k=+1 isotropic cosmologies from spatial discretisations
Klaus Liegener, Stefan Andreas Weigl
The closed, spatially isotropic FLRW universe (k=+1) is endowed with modifications due to a discrete underlying space-structure. Motivated from Loop Quantum Gravity techniques, a f…