Dark Energy Cosmology with a Rarita-Schwinger Field |
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| Authors: | Zu-Yao Sun You-Gen Shen |
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| Institution: | (1) Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, 200030, People's Republic of China;(2) Graduate School of Chinese Academy of Sciences, Beijing, 100039, People's Republic of China;(3) National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, People's Republic of China;(4) Institute of Theoretical physics, Chinese Academy of Sciences, Beijing, 100080, People's Republic of China;(5) Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, 200030, People's Republic of China |
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| Abstract: | Recent observations of the Cosmic Microwave Background, Supernovae and Sloan Digital Sky Survey (SDSS) show that our universe has a critical energy density, and roughly 2/3 of it is dark energy, which drives the accelerating expansion of the cosmos. In view of the astrophysical data, we find that the equation of state parameter of the dark energy lies in a narrow range around w = −1. In this paper, we construct a cosmology model with a Rarita-Schwinger field to realize the equation of state parameter w < −1 or w > −1 and discuss its stability. |
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| Keywords: | cosmology dark energy Rarita– Schwinger field |
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