203 citations · 1.1k across the 19 of their papers we have counts for
19 papers
Semiclassical Quantum Gravity: Obtaining Manifolds from Graphs
Luca Bombelli, Alejandro Corichi, Oliver Winkler
We address the "inverse problem" for discrete geometry, which consists in determining whether, given a discrete structure of a type that does not in general imply geometrical infor…
Manifestly Gauge-Invariant General Relativistic Perturbation Theory: II. FRW Background and First Order
K. Giesel, S. Hofmann, T. Thiemann +1
In our companion paper we identified a complete set of manifestly gauge-invariant observables for general relativity. This was possible by coupling the system of gravity and matter…
Manifestly Gauge-Invariant General Relativistic Perturbation Theory: I. Foundations
K. Giesel, S. Hofmann, T. Thiemann +1
Linear cosmological perturbation theory is pivotal to a theoretical understanding of current cosmological experimental data provided e.g. by cosmic microwave anisotropy probes. A k…
Quantum gravity and the Coulomb potential
Viqar Husain, Jorma Louko, Oliver Winkler
We apply a singularity resolution technique utilized in loop quantum gravity to the polymer representation of quantum mechanics on R with the singular -1/|x| potential. On an equis…
Semiclassical states for quantum cosmology
Viqar Husain, Oliver Winkler
In a metric variable based Hamiltonian quantization, we give a prescription for constructing semiclassical matter-geometry states for homogeneous and isotropic cosmological models.…
Quantum Hamiltonian for gravitational collapse
Viqar Husain, Oliver Winkler
Using a Hamiltonian formulation of the spherically symmetric gravity-scalar field theory adapted to flat spatial slicing, we give a construction of the reduced Hamiltonian operator…