Alternative dark energy theories allow the equation of state parameter w to differ from -1
the verdict
SUPPORTED
the evidence backs this
confidence 89/100
Alternative dark energy frameworks, such as quintessence, quintom, and alpha-attractor models, explicitly permit the dark energy equation of state parameter w to deviate from the cosmological constant value of -1.
Evidence for · 6
Dark energy, α-attractors, and large-scale structure surveys
2017 · cited by 157
The paper discusses alpha-attractor models with dynamical dark energy where certain models feature an equation of state w different from -1.
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More for · 5
Interpreting DESI 2024 BAO: Late-time dynamical dark energy or a local effect?
2024 · cited by 101
The paper notes that physical quintessence models fit data well and model-independently explore deviations from w = -1.
Observational Constraints on Dynamical Dark Energy with Pivoting Redshift
2018 · cited by 44
The paper investigates generalized parametrizations where the dark energy equation of state parameter varies.
Observational challenges to holographic and Ricci dark energy paradigms: Insights from ACT DR6 and DESI DR2
2025 · cited by 15
The paper examines dynamical dark energy models like holographic and Ricci dark energy where the equation of state evolves away from a cosmological constant.
Early dark energy beyond slow-roll: Implications for cosmic tensions
2023 · cited by 6
The paper explores early dark energy models allowing for an equation of state w differing from -1.
The quintom theory of dark energy after DESI DR2.
2026 · cited by 0
The paper reviews quintom cosmology and dynamical dark energy models where the equation of state parameter evolves across w = -1.