Crossing the phantom barrier with purely kinetic multiple k-essence

2006/04/05 by Luis P. Chimento, Ruth Lazkoz
Mathematics · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #COSMIC cancer database #Classical mechanics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Imaging phantom #Kinetic energy #Mathematical analysis #Mathematics #Optics #Physics #Polynomial #Singularity #Statistical physics #Theoretical physics #astro-ph

paper · pdf · doi:10.1016/j.physletb.2006.07.017

published as Phys.Lett. B639 (2006) 591-595 · 5 pages, revtex

arxiv created 2006/04/05 · openalex publication_date 2006/07/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We consider multiple k-essence sources and obtain the conditions their kinetic functions must satisfy so that purely kinetic k-essences lead to models with phantom barrier crossing. After that, we show that polynomial kinetic functions allow the integration of the dynamical equations determining the geometry and the k-fields. The models thus obtained have accelerated expansion at late cosmic time, representing universes ending at a finite time with a big rip singularity. In addition, these models begin to evolve from an initial singularity, so they have a finite time span.

Citations

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