What if gravity becomes really repulsive in the future?

被引:0
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作者
Imanol Albarran
Mariam Bouhmadi-López
João Morais
机构
[1] Universidade da Beira Interior,Departamento de Física
[2] Centro de Matemática e Aplicações da Universidade da Beira Interior,Department of Theoretical Physics
[3] University of the Basque Country UPV/EHU,undefined
[4] IKERBASQUE,undefined
[5] Basque Foundation for Science,undefined
来源
The European Physical Journal C | 2018年 / 78卷
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摘要
The current acceleration of the Universe is one of the most puzzling issues in theoretical physics nowadays. We are far from giving an answer in this letter to the question of its nature. Yet, with the observations we have at hand, we analyse the different patterns that the gravitational potential can show in the future. Surprisingly, gravity not only can get weaker in the near future, it can even become repulsive; or equivalently, the gravitational potential may become negative. We show this remark by using one of the simplest phenomenological model we can imagine for dark energy. We have also reviewed the statefinder approach of these models. For completeness, we have also showed the behaviour of the density contrast of dark matter and dark energy for these simple (yet illustrative models). Our results are displayed and we see how they shall evolve in the future.
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