from 30 May 2023 to 1 June 2023
Europe/Lisbon timezone

Stability Conditions for the Horndeski Scalar Field Gravity Model

31 May 2023, 14:50


Faculdade de Ciências da Universidade de Lisboa (PT)


Cláudio GOMES


We constrain the viable models of Horndeski gravity after the GWs events by resorting to the Witten positive energy theorem. We find that the free function G3(ϕ,X) in the Lagrangian is con- strained to be a function solely of the scalar field, G3(ϕ). In addition,relations among the free functions are found. Other criteria for stability are also analysed, such as the attractiveness of gravity, and the Dolgov-Kawasacki instability. Some applications for cosmology are discussed.

Presentation Materials

There are no materials yet.
Your browser is out of date!

Update your browser to view this website correctly. Update my browser now