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- W3103148603 abstract "We introduce a new set of flow parameters to describe the time dependence of the equation of state and the speed of sound in single field cosmological models. A scale invariant power spectrum is produced if these flow parameters satisfy specific dynamical equations. We analyze the flow of these parameters and find four types of fixed points that encompass all known single field models. Moreover, near each fixed point we uncover new models where the scale invariance of the power spectrum relies on having simultaneously time varying speed of sound and equation of state. We describe several distinctive new models and discuss constraints from strong coupling and superluminality." @default.
- W3103148603 created "2020-11-23" @default.
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- W3103148603 date "2012-10-30" @default.
- W3103148603 modified "2023-10-16" @default.
- W3103148603 title "The four fixed points of scale invariant single field cosmological models" @default.
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- W3103148603 doi "https://doi.org/10.1088/1475-7516/2012/10/054" @default.
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