3 papers
gr-qc2025
Scalar-tensor theories at different scales: averaging the scalar sector
Jean-Philippe Uzan, Hugo Lévy
This article investigates the averaging of a scalar degree of freedom that couples universally to matter. It quantifies the approximation of smoothing the matter distribution befor…
gr-qc2025
Testing screened scalar-tensor theories of gravity with atomic clocks
Hugo Lévy, Jean-Philippe Uzan
In any scalar-tensor theory of gravity exhibiting a screening mechanism, the fifth force mediated by the scalar field is dynamically suppressed at sub-Solar system scales, allowing…
gr-qc2024
What to expect from scalar-tensor space geodesy
Hugo Lévy, Joël Bergé, Jean-Philippe Uzan
Scalar-tensor theories with screening mechanisms come with non-linearities that make it difficult to study setups of complex geometry without resorting to numerical simulations. In…