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Exponential Quintessence and the End of Acceleration
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Recent observations indicate that the universe's expansion has been accelerating of late. But recent theoretical work has highlighted the difficulty of squaring acceleration with the underlying assumptions of string theory, disfavoring most models of quintessence. because they predict eternal acceleration. We show that one of the simplest and most motivated quintessence models described by an exponential potential can produce the acceleration needed to explain the data while also predicting only a finite period of acceleration, consistent with theoretical paradigms. This model is no more tuned than the canonical tracking quintessence models.
Forward citations
Cited by 2 Pith papers
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Higher-Order Analytical Expansion of Thawing Dark Energy with an Exponential Potential
For exponential-potential quintessence, a new fourth-order analytic correction, including a background expansion correction, improves the predicted dark energy equation of state compared with the leading-order thawing...
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Exponential Quintessence Model: Analytical Quantification of the Fine-Tuning Problem in Dark Energy
Exponential quintessence with an assumed kination epoch relaxes the dark energy fine-tuning problem by dozens of orders of magnitude relative to a cosmological constant.
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