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Testing for a Super-Acceleration Phase of the Universe
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We propose a method to probe the phenomenological nature of dark energy which makes no assumptions about the evolution of its energy density. We exemplify this method with a test for a super-acceleration phase of the universe i.e., a phase when the dark energy density grows as the universe expands. We show how such a phase can be detected by combining SNIa (SNAP-like) and CMB (Planck) data without making any assumptions about the evolution of the dark energy equation of state, or about the value of the matter density parameter.
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Cited by 1 Pith paper
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Understanding acoustic scale observations: the one-sided fight against $\Lambda$
Under the null energy condition, BAO distances can deviate from Lambda-CDM only in one direction, and DESI's main apparent tensions sit on the forbidden side.
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