3 papers
hep-th2026
Covariant scalar-tensor theories beyond second derivatives
Mohammad Ali Gorji, Pavel Petrov, Karim Noui
We propose a covariant, gauge-independent construction of foliation-based scalar-tensor theories, yielding diffeomorphism-invariant operators involving only gradients on the hypers…
gr-qc2026
Towards Gravitational Wave Turbulence within the Hadad-Zakharov metric
Benoît Gay, Eugeny Babichev, Sébastien Galtier +1
The theory of gravitational wave turbulence describes the long-term statistical behaviour of a set of weakly nonlinear interacting waves. In this paper, we aim to study aspects of…
gr-qc2025
Degenerate higher-order Maxwell-Einstein theories
Aimeric Colléaux, Karim Noui
We classify higher-order Maxwell-Einstein theories linear in the curvature tensor and quadratic in the derivatives of the electromagnetic field strength whose kinetic matrices are…