Can I read Ostrogradsky instability and Born-Infeld modified cosmology in Palatini formalism on EtoBox?

Ostrogradsky instability and Born-Infeld modified cosmology in Palatini formalism by Rajagopal, Srivatsan; Kumar, Ajit is a scholarly article available to read on EtoBox.

What is Ostrogradsky instability and Born-Infeld modified cosmology in Palatini formalism about?

The Ostrogradsky instability of higher derivative Lagrangians is derived from first principles using Control theory and Lyapunov Stability Analysis. This result is then used to argue that Born-Infeld Lagrangians are viable modifications of the Einstein-Hilbert action provided the action is varied in accordance with the Palatini formalism, in contrast to the metric formalism. Finally, the Born-Infeld version of the FRW equations are derived and the cosmological dynamics is studied for matter dominated closed and open universes, and the results are compared with the usual cosmology.

Author

Rajagopal, Srivatsan; Kumar, Ajit

Published

2013

Language

EN