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Chimento, L.P.; Forte, M. "Anisotropic k-essence cosmologies" (2006) Physical Review D - Particles, Fields, Gravitation and Cosmology. 73(6)
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Abstract:

We investigate a Bianchi type-I cosmology with k-essence and find the set of models which dissipate the initial anisotropy. There are cosmological models with extended tachyon fields and k-essence having a constant barotropic index. We obtain the conditions leading to a regular bounce of the average geometry and the residual anisotropy on the bounce. For constant potential, we develop purely kinetic k-essence models which are dust dominated in their early stages, dissipate the initial anisotropy, and end in a stable de Sitter accelerated expansion scenario. We show that linear k-field and polynomial kinetic function models evolve asymptotically to Friedmann-Robertson-Walker cosmologies. The linear case is compatible with an asymptotic potential interpolating between Vl -γl, in the shear dominated regime, and Vl -2 at late time. In the polynomial case, the general solution contains cosmological models with an oscillatory average geometry. For linear k-essence, we find the general solution in the Bianchi type-I cosmology when the k field is driven by an inverse square potential. This model shares the same geometry as a quintessence field driven by an exponential potential. © 2006 The American Physical Society.

Registro:

Documento: Artículo
Título:Anisotropic k-essence cosmologies
Autor:Chimento, L.P.; Forte, M.
Filiación:Departamento de Física, Facultad de Ciencias Exactas Y Naturales, Pabellón I, 1428 Buenos Aires, Argentina
Año:2006
Volumen:73
Número:6
DOI: http://dx.doi.org/10.1103/PhysRevD.73.063502
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:15507998
CODEN:PRVDA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v73_n6_p_Chimento

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Citas:

---------- APA ----------
Chimento, L.P. & Forte, M. (2006) . Anisotropic k-essence cosmologies. Physical Review D - Particles, Fields, Gravitation and Cosmology, 73(6).
http://dx.doi.org/10.1103/PhysRevD.73.063502
---------- CHICAGO ----------
Chimento, L.P., Forte, M. "Anisotropic k-essence cosmologies" . Physical Review D - Particles, Fields, Gravitation and Cosmology 73, no. 6 (2006).
http://dx.doi.org/10.1103/PhysRevD.73.063502
---------- MLA ----------
Chimento, L.P., Forte, M. "Anisotropic k-essence cosmologies" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 73, no. 6, 2006.
http://dx.doi.org/10.1103/PhysRevD.73.063502
---------- VANCOUVER ----------
Chimento, L.P., Forte, M. Anisotropic k-essence cosmologies. Phys Rev D Part Fields Gravit Cosmol. 2006;73(6).
http://dx.doi.org/10.1103/PhysRevD.73.063502