3 papers
gr-qc2026
Light propagation and intensity transport in metric-affine geometry
Antonio De Felice, Lavinia Heisenberg, Gonzalo J. Olmo +1
We study electromagnetic wave propagation in metric--affine geometries, where torsion and non-metricity may be present and the coupling between electromagnetism and spacetime is no…
gr-qc2026
Cosmology from asymptotically safe Proca theories
Carlos Pastor-Marcos, Lavinia Heisenberg, Álvaro Pastor-Gutiérrez +2
Effective field theories for cosmology offer a powerful framework to investigate the dynamics of space--time and address longstanding open puzzles. In this work, we initiate a prog…
gr-qc2025
Neutron stars in gravity
Lavinia Heisenberg, Carlos Pastor-Marcos
We investigate the challenges of constructing neutron star (NS) solutions in gravity, highlighting the importance of treating the affine connection as an active, dy…