142 citations · 157 across the 17 of their papers we have counts for
17 papers
Non-perturbative, background independent canonical quantum gravity in Fock representations
Thomas Thiemann
It is commonly believed that a quantum field theory of General Relativity requires a non-perturbative formulation. In addition, the background independence of classical General Rel…
Non-perturbative, background independent Fock representations for canonical quantum gravity
T. Thiemann
A UV complete quantum field theory of general relativity is believed to require a non-perturbative approach. Moreover, background independence of classical general relativity suppl…
Quantum Field Theory of Black Hole Perturbations with Backreaction VI. Apparent Horizons, Quasi-Local Mass and Effective Classical Metrics
Jonas Neuser, Thomas Thiemann
In a recent series of papers we developed a first-principle and gauge invariant approach to black hole perturbation theory valid to any order. We included back reaction effects to…
(Quantum) reference frames, relational observables, gauge reduction and physical interpretation
Thomas Thiemann
It is mandatory to know how to operationally define and translate a reference frame into mathematics, in order that a physical interpretation of theory calculations in terms of obs…
Quantum Field Theory of Black Hole Perturbations with Backreaction V. Beyond Second Order Perturbations
Jonas Neuser, Thomas Thiemann
Black hole perturbation theory beyond second order is not well understood because typically one defines the meaning of gauge invariance order by order which is ambiguous. In this s…
Asymptotically safe canonical quantum gravity: Gaussian dust matter
Renata Ferrero, Thomas Thiemann
In a recent series of publications we have started to investigate possible points of contact between the canonical (CQG) and the asymptotically safe (ASQG) approach to quantum grav…
Non-perturbative Quantum Gravity in Fock representations
Thomas Thiemann
Perturbative quantum gravity starts from prescribing a background metric. That background metric is then used in order to carry out two separate steps: 1. One splits the non-pertur…
Quantum Field Theory of Black Hole Perturbations with Backreaction III. Spherically symmetric 2nd order Maxwell sector
Jonas Neuser, Thomas Thiemann
In this paper we extend reduced phase space approach to black hole perturbation theory to Maxwell matter. We expand the resulting reduced Hamiltonian to second order in the gravito…
Quantum Field Theory of Black Hole Perturbations with Backreaction II. Spherically symmetric 2nd order Einstein sector
Jonas Neuser, Thomas Thiemann
In this second paper of our series we focus on the classical pure gravity sector of spherically symmetric black hole perturbations and expand the reduced Hamiltonian to second orde…
Quantum Field Theory of Black Hole Perturbations with Backreaction: I. General framework
Thomas Thiemann
In a seminal work, Hawking showed that natural states for free quantum matter fields on classical spacetimes that solve the spherically symmetric vacuum Einstein equations are KMS…
Symmetry reduction, gauge reduction, backreaction and consistent higher order perturbation theory
Thomas Thiemann
For interacting classical field theories such as general relativity exact solutions typically can only be found by imposing physically motivated (Killing) {\it symmetry} assumption…
Asymptotically safe -- canonical quantum gravity junction
Thomas Thiemann
The canonical (CQG) and asymptotically safe (ASQG) approach to quantum gravity share to be both non-perturbative programmes. However, apart from that they seem to differ in several…
Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase model
Renata Ferrero, Thomas Thiemann
In a recent contribution we identified possible points of contact between the asymptotically safe and canonical approach to quantum gravity. The idea is to start from the reduced p…
Quantum Cosmological Backreactions III: Deparametrised Quantum Cosmological Perturbation Theory
S. Schander, T. Thiemann
This is the third paper in a series of four in which we use space adiabatic methods in order to incorporate backreactions among the homogeneous and between the homogeneous and inho…
Quantum Cosmological Backreactions II: Purely Homogeneous Quantum Cosmology
J. Neuser, S. Schander, T. Thiemann
This is the second paper in a series of four in which we use space adiabatic methods in order to incorporate backreactions among the homogeneous and between the homogeneous and inh…
Quantum Cosmological Backreactions I: Cosmological Space Adiabatic Perturbation Theory
S. Schander, T. Thiemann
The search for quantum gravity fingerprints in currently available cosmological data that have their origin from the Planck era is of growing interest due to major recent progress…
Scalar Material Reference Systems and Loop Quantum Gravity
Kristina Giesel, Thomas Thiemann
In the past, the possibility to employ (scalar) material reference systems in order to describe classical and quantum gravity directly in terms of gauge invariant (Dirac) observabl…