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Hamilton-Jacobi formalism for Generalized Chaplygin Gas models by Ignatov, Yordan; Pieroni, Mauro is a scholarly article available to read on EtoBox.

What is Hamilton-Jacobi formalism for Generalized Chaplygin Gas models about?

In this work we discuss the application of the Hamilton-Jacobi formalism on the scalar field implementation of Generalized Chaplygin Gas models. This corresponds to a Generalised Born-Infeld action for the scalar field, which in an initial fast-rolling phase mimics a matter-like behavior and in the final slow-rolling phase mimics a cosmological constant. In order to enrich the phenomenology of the model, we add an extra functional freedom, specified through a scalar potential for the field. Interestingly, we find that, due to the lifting induced by the non-standard kinetic term, an asymptotic de Sitter-like configuration can be obtained even for negative potentials. We show that at the background level, this model can easily mimic the {\Lambda}CDM model both with and without independent baryonic and radiation components.

Author

Ignatov, Yordan; Pieroni, Mauro

Published

2021

Language

EN