I will discuss the recently proposed models for a scalar in which higher order terms in derivatives are present in the action whereas the equations of motion remain second order, avoiding that way the Ostrogradsky instability. I will show how these actions can be obtain from extra dimensions and also their relation with massive gravity. Although these theories were initially developed for scalar fields, analogous actions for higher spin fields can be devise.
Jose Beltran Jiménez: Galileon fields
Jose Beltran Jiménez, visitor from the University of Geneva
Published Feb. 10, 2012 12:33 PM
- Last modified Feb. 14, 2012 11:39 AM