23-25 September 2020
America/Bogota timezone

Dark Energy from Coupled $p-$forms

Sep 23, 2020, 2:20 PM
20m

Speaker

Alejandro Guarnizo (Universidad Antonio Nariño)

Description

In this work we study the possibility to obtain an accelerated expansion from arbitrary couplings between $p$-forms in a 4-dimensional space-time. The Lagrangian is built with couplings between 1- and 2-forms with kinetic functions of a scalar field $\phi$ (a quintessence field in this context). By using a dynamical system approach, we study the evolution of the fields in an anisotropic background, which is a natural framework to show if the interaction between $p$-forms can sustain a non-negligible shear. In addition, we found conditions for the cosmological viability of a dark energy dominated epoch. The evolution and stability is also confirmed by numerical integrations.

Primary authors

Alejandro Guarnizo (Universidad Antonio Nariño) Juan Pablo Beltran (Universidad Nacional de Colombia) Cesar A. Valenzuela-Toledo (Universidad del Valle)

Presentation materials