Abstract
Conformal transformation as a mathematical tool has been used in many areas of gravitational physics. In this paper, we consider gravity’s rainbow, in which the metric can be treated as a conformal rescaling of the original metric. By using the conformal transformation technique, we get a specific form of a modified Newton’s constant and cosmological constant in gravity’s rainbow, which implies that the total vacuum energy is dependent on probe energy. Moreover, the result shows that Einstein gravity’s rainbow can be described by energy-dependent \(f(E,\tilde{R})\) gravity. At last, we study the f(R) gravity, when gravity’s rainbow is considered, which can also be described as energy-dependent \(\tilde{f}(E,\tilde{R})\) gravity.
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Acknowledgements
We would like to thank the National Natural Science Foundation of China (Grant No. 11571342) for supporting us on this work.
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He, M., Li, P., Wang, ZL. et al. Conformal transformation route to gravity’s rainbow. Gen Relativ Gravit 50, 22 (2018). https://doi.org/10.1007/s10714-018-2339-7
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DOI: https://doi.org/10.1007/s10714-018-2339-7