302 citations · 3.7k across the 68 of their papers we have counts for
74 papers
Lorentzian quantum cosmology from effective spin foams
Bianca Dittrich, José Padua-Argüelles
Effective spin foams provide the computationally most efficient spin foam models yet and are therefore ideally suited for applications e.g. to quantum cosmology. We provide here th…
Lorentzian quantum gravity via Pachner moves: one-loop evaluation
Johanna N. Borissova, Bianca Dittrich
Lorentzian quantum gravity is believed to cure the pathologies encountered in Euclidean quantum gravity, such as the conformal factor problem. We show that this is the case for the…
Twisted geometries are area-metric geometries
Bianca Dittrich, José Padua-Argüelles
The quantum geometry arising in Loop Quantum Gravity has been known to semi-classically lead to generalizations of length-geometries. There have been several attempts to interpret…
Spin foams, Refinement limit and Renormalization
Seth K. Asante, Bianca Dittrich, Sebastian Steinhaus
Spin foams provide path integrals for quantum gravity, which employ discretizations as regulator. To obtain regulator independent predictions, we must remove these fiducial structu…
Frontiers of Quantum Gravity: shared challenges, converging directions
Jan de Boer, Bianca Dittrich, Astrid Eichhorn +10
Understanding the quantum nature of spacetime and gravity remains one of the most ambitious goals of theoretical physics. It promises to provide key new insights into fundamental p…
Towards effective actions for the continuum limit of spin foams
Johanna N. Borissova, Bianca Dittrich
Spin foams arise from a quantization of classical gravity expressed via the Plebanski action. Key open questions related to the continuum limit of spin foams are whether general re…