Interacting fluids generating identical, dual and phantom cosmologies
We find the group of symmetry transformations generated by interacting fluids in spatially flat Friedmann-Robertson-Walker (FRW) spacetime which links cosmologies with the same scale factor (identity) or with scale factors a and a-1 (duality). There exists a duality between contracting and superacce...
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| Formato: | Artículo publishedVersion |
| Lenguaje: | Inglés |
| Publicado: |
2006
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v633_n1_p9_Chimento |
| Aporte de: |
| Sumario: | We find the group of symmetry transformations generated by interacting fluids in spatially flat Friedmann-Robertson-Walker (FRW) spacetime which links cosmologies with the same scale factor (identity) or with scale factors a and a-1 (duality). There exists a duality between contracting and superaccelerated expanding scenarios associated with (phantom) cosmologies. We investigate the action of this symmetry group on self-interacting minimally (conformally) coupled quintessence and k-essence cosmologies. © 2005 Elsevier B.V. All rights reserved. |
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