Cosmological Perturbations in Phantom Dark Energy Models
Abstract
:1. Introduction
- i
- ii
- iii
2. Background Models
- i
- ii
- The LR abrupt event model: an event of the type LR [11,12,13] can be caused by a perfect fluid whose EoS and energy density can be written as [12]
- iii
- The LSBR abrupt event model: the event denominated as LSBR can be induced by a perfect fluid whose EoS deviates from that of a cosmological constant by adding a constant parameter [14]. Therefore, the corresponding EoS and energy density in terms of the scale factor can be written asNote that plays the role of a cosmological constant. In this case, we have chosen the numerical value taken in [14]: , while for and , we have used the same values as in the case for the BR.
3. Perturbed Equations
4. Results
5. Discussion
Acknowledgments
Author Contributions
Conflicts of Interest
References
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- 1.In this work we disregard any anisotropy at the linear level of the scalar perturbations, therefore, from this point onward we will set [27].
- 2.From now on, all perturbed quantities referred to in the manuscript represent the Fourier transform action of such perturbations, even though no specific notation is used, e.g., , where k is the wave-number.
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Albarran, I.; Bouhmadi-López, M.; Morais, J. Cosmological Perturbations in Phantom Dark Energy Models. Universe 2017, 3, 22. https://doi.org/10.3390/universe3010022
Albarran I, Bouhmadi-López M, Morais J. Cosmological Perturbations in Phantom Dark Energy Models. Universe. 2017; 3(1):22. https://doi.org/10.3390/universe3010022
Chicago/Turabian StyleAlbarran, Imanol, Mariam Bouhmadi-López, and João Morais. 2017. "Cosmological Perturbations in Phantom Dark Energy Models" Universe 3, no. 1: 22. https://doi.org/10.3390/universe3010022