13 citations · 44 across the 10 of their papers we have counts for
10 papers
Kandinsky Conformal Prediction: Efficient Calibration of Image Segmentation Algorithms
Joren Brunekreef, Eric Marcus, Ray Sheombarsing +2
Image segmentation algorithms can be understood as a collection of pixel classifiers, for which the outcomes of nearby pixels are correlated. Classifier models can be calibrated us…
Zooming in on the Universe: In Search of Quantum Spacetime
Joren Brunekreef
This thesis investigates low-dimensional models of nonperturbative quantum gravity, with a special focus on Causal Dynamical Triangulations (CDT). We define the so-called curvature…
Simulating CDT quantum gravity
Joren Brunekreef, Andrzej Görlich, Renate Loll
We provide a hands-on introduction to Monte Carlo simulations in nonperturbative lattice quantum gravity, formulated in terms of Causal Dynamical Triangulations (CDT). We describe…
The phase structure and effective action of 3D CDT at higher spatial genus
Joren Brunekreef, Dániel Németh
We perform a detailed investigation of the phase structure and the semiclassical effective action of (2+1)-dimensional Causal Dynamical Triangulations (CDT) quantum gravity using c…
On the Nature of Spatial Universes in 3D Lorentzian Quantum Gravity
J. Brunekreef, R. Loll
Three-dimensional Lorentzian quantum gravity, expressed as the continuum limit of a nonperturbative sum over spacetimes, is tantalizingly close to being amenable to analytical meth…
Quantum Flatness in Two-Dimensional CDT Quantum Gravity
J. Brunekreef, R. Loll
Flatness -- the absence of spacetime curvature -- is a well-understood property of macroscopic, classical spacetimes in general relativity. The same cannot be said about the concep…
One-matrix differential reformulation of two-matrix models
Joren Brunekreef, Luca Lionni, Johannes Thürigen
Differential reformulations of field theories are often used for explicit computations. We derive a one-matrix differential formulation of two-matrix models, with the help of which…
Approximate Killing symmetries in non-perturbative quantum gravity
Joren Brunekreef, Marcus Reitz
It is an open question whether fluctuations at the Planck scale in a non-perturbative theory of quantum gravity behave in such a way that the resulting semi-classical geometry can…
Curvature profiles for quantum gravity
J. Brunekreef, R. Loll
Building on the recently introduced notion of quantum Ricci curvature and motivated by considerations in nonperturbative quantum gravity, we advocate a new, global observable for c…
On the Semi-Classical Limit of Scalar Products of the XXZ Spin Chain
Yunfeng Jiang, Joren Brunekreef
We study the scalar products between Bethe states in the XXZ spin chain with anisotropy in the semi-classical limit where the length of the spin chain and the number of mag…