3 papers
gr-qc2025
Perturbative emergent modified gravity on cosmological backgrounds: Kinematics
Martin Bojowald, Manuel Diaz, Erick I. Duque
Emergent modified gravity has shown that the canonical formulation of general relativity gives rise to a larger class of covariant modifications than action-based approaches, so fa…
gr-qc2025
Singularities in loop quantum cosmology
Martin Bojowald, Manuel Diaz, Erick I. Duque
Quantum effects are expected to modify the cosmological dynamics of the early universe while maintaining some (potentially discrete) notion of space-time structure. In one approach…
gr-qc2024
Space-time superpositions as fluctuating geometries
Kallan Berglund, Martin Bojowald, Aurora Colter +1
Superpositions of black holes can be described geometrically using a combined canonical formulation for space-time and quantum states. A previously introduced black-hole model that…