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Quest for Potentials in the Quintessence Scenario

DOI: 10.4236/jamp.2016.42027, PP. 211-214

Keywords: Dark Energy, Quintessence, Thawing Model, Freezing Model

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The time evolution of the equation of state w for quintessence scenario with a scalar field as dark energy is studied up to the third derivative (d3w/da3) with respect to the scale factor a, in order to predict the future observations and specify the scalar potential parameters with the observables. The third derivative of w for general potential V is derived and applied to several types of potentials. They are the inverse power-law (V = M4 + α/Qα), the exponential ?\"\", the mixed \"\" , the cosine \"\" ?and the Gaussian types \"\" , which are prototypical potentials for the freezing and thawing models. If the parameter number for a potential form is n, it is necessary to find at least for n + 2 independent observations to identify the potential for0m and the evolution of the scalar field (Q and \"\"


[1]  Muromachi, Y., Okabayashi, A., Okada, D., Hara, T. and Itoh, Y. (2015) Search for Dark Energy Potentials in Quintessence. Progress of Theoretical & Experimental Physics, 2015, 093E01. [arXiv:1503.03678 [astro-ph]]
[2]  Hara, T., Sakata, R., Muromachi, Y. and Itoh, Y. (2014) Time Variation of Equation of State for Dark Energy. Progress of Theoretical & Experimental Physics, 2014, 113E01. [arXiv:1409.2726[astro-ph]]
[3]  Planck Collaborations: Ade, P.A.R., et al. (2015) Planck 2015 Results. XIV. Dark energy and Modified Gravity. [ar-Xiv:1502.01590[astro-ph]]
[4]  Linder, E.V. (2003) Exploring the Expansion History of the Universe. Physical Review Letters, 90, 091301. [arXiv:0208512v1[astro-ph]]
[5]  Steinhardt, P.J., Wang, L. and Zlatev, I. (1999) Cosmological Tracking Solutions. Physical Review D, 59, 123504.
[6]  Zlatev, I., Wang, L. and Steinhardt, P.J. (1999) Quintessence, Cosmic Coincidence, and the Cosmological Constant. Physical Review Letters, 82, 896.
[7]  Caldwell, R.R. and Linder, E.V. (2005) Limits of Quintessence. Physical Review Letters, 95, 141301.
[8]  Peebles, P.J.E. and Ratra, B. (1988) The Cosmology with a Time-Variable Cosmological “Constant”. Astrophysical Journal, 325, L17-L20.
[9]  Brax, Ph. and Martin, J. (1999) Quintessence and Supergravity. Physics Letters B, 468, 40-45.
[10]  Amendola, L. and Tsujikawa, S. (2010) Dark Energy. Cambridge University Press, Cambridge.


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