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- W3208718717 abstract "It has been shown a specific Horndeski theory of gravity arises from a consistent Kaluza-Klein reduction of the gravi-dilaton sector of the low-energy effective heterotic string action with a first $alpha'$ correction. Here we provide a first investigation of the cosmological solutions to the lower dimensional theory by constructing exact solutions to the field equations in various frames. At tree level, in string frame, we find the duality symmetry of the parent theory is unaltered by dimensional reduction, leading to standard bouncing and pre-Big Bang scenario solutions. For $alpha'neq0$, we uncover exact models exhibiting cosmic acceleration, where we find interesting physics concerning the number of noncompact dimensions. Certain stability requirements demand the inclusion of a dilaton potential." @default.
- W3208718717 created "2021-11-08" @default.
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- W3208718717 date "2021-10-01" @default.
- W3208718717 modified "2023-09-24" @default.
- W3208718717 title "Cosmic acceleration from string induced Galileons" @default.
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- W3208718717 doi "https://doi.org/10.1088/1475-7516/2021/10/076" @default.
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