Quintessence as k-essence
Quintessence and k-essence have been proposed as candidates for the dark energy component of the universe that would be responsible of the currently observed accelerated expansion. In this Letter we investigate the degree of resemblance between those two theoretical setups, and find that every quint...
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| Autores principales: | , , |
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| Formato: | Artículo publishedVersion |
| Publicado: |
2005
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v631_n3_p93_Aguirregabiria https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_03702693_v631_n3_p93_Aguirregabiria_oai |
| Aporte de: |
| Sumario: | Quintessence and k-essence have been proposed as candidates for the dark energy component of the universe that would be responsible of the currently observed accelerated expansion. In this Letter we investigate the degree of resemblance between those two theoretical setups, and find that every quintessence model can be viewed as a k-essence model generated by a kinetic linear function. In addition, we show the true effects of k-essence begin at second order in the expansion of the kinetic function in powers of the kinetic energy. © 2005 Elsevier B.V. All rights reserved. |
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