12 citations · 42 across the 7 of their papers we have counts for
6 papers · 1 filter
Causal structure and light-conical singularities in Lorentzian simplicial quantum gravity
Bianca Dittrich, José Padua-Argüelles
The definition of a Lorentzian gravitational path integral requires specifying which causal struc- tures are admitted off shell. Of particular importance are light-conical singular…
Renormalization group flows in area-metric gravity
Johanna Borissova, Bianca Dittrich, Astrid Eichhorn +1
We put forward the first analysis of renormalization group flows in an area-metric theory, motivated by spin-foam quantum gravity. Area-metric gravity contains the well-known lengt…
Spikes and spines in 4D Lorentzian simplicial quantum gravity
Johanna Borissova, Bianca Dittrich, Dongxue Qu +1
Simplicial approaches to quantum gravity such as quantum Regge calculus and spin foams include configurations where bulk edges can become arbitrarily large while the boundary edges…
Spikes and spines in 3D Lorentzian simplicial quantum gravity
Johanna Borissova, Bianca Dittrich, Dongxue Qu +1
Simplicial approaches to quantum gravity such as Quantum Regge Calculus and Spin Foams include configurations where bulk edges can become arbitrarily large while keeping the length…
De Sitter horizon entropy from a simplicial Lorentzian path integral
Bianca Dittrich, Ted Jacobson, José Padua-Argüelles
The dimension of the Hilbert space of a quantum gravitational system can be written formally as a path integral partition function over Lorentzian metrics. We implement this in a 2…
Area-metric gravity revisited
Johanna N. Borissova, Bianca Dittrich, Kirill Krasnov
Area metrics are an intriguing generalization of length metrics which appears in several quantum-gravity approaches. We describe the space of diffeomorphism-invariant area-metric a…