期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 10, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2013/10/052
关键词
modified gravity; quantum gravity phenomenology; physics of he early universe; cosmology of theories beyond the SM
资金
- Benha University
- Excellence-in-Research Fellowship of IIT Gandhinagar
- CTP in Zewail City
In this work, we study FRW cosmologies in the context of gravity rainbow. We discuss the general conditions for having a nonsingular FRW cosmology in gravity rainbow. We propose that gravity rainbow functions can be fixed using two known modified dispersion relation (MDR), which have been proposed in literature. The first MDR was introduced by Amelino-Camelia, et el. in and the second was introduced by Magueijo and Smolin in [24] Studying these FRW-like cosmologies, after fixing the gravity rainbow functions, leads to nonsingular solutions which can be expressed in exact forms.
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