General solutions to $$\mathcal {N}$$ N -field cosmology with exponential potentials
Abstract We construct the general analytical solution for the $$\mathcal {N}$$ N -field product-exponential potential in an expanding FLRW background. We demonstrate the relevance of this analytical solution in more general contexts for the derivation of estimates for the transitional time between a...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-09268-5 |
| Summary: | Abstract We construct the general analytical solution for the $$\mathcal {N}$$ N -field product-exponential potential in an expanding FLRW background. We demonstrate the relevance of this analytical solution in more general contexts for the derivation of estimates for the transitional time between an arbitrary initial state and the slow-roll solutions. In certain cases, these estimates can also be used to demonstrate the non-linear convergence towards the slow-roll solutions. In addition, we extend the solution to include stiff matter as well. |
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| ISSN: | 1434-6044 1434-6052 |