Any unified early and late dark energy scenario with a single tracking scalar field requires a potential with three distinct slopes arranged in a steep-steeper-shallow hierarchy.
Single field slow-roll inflation with step uplift to $n_s=1$
3 Pith papers cite this work. Polarity classification is still indexing.
3
Pith papers citing it
abstract
The early dark energy resolution of Hubble tension seems to be suggesting a scale-invariant Harrison-Zeldovich spectrum of primordial scalar perturbation, i.e. $n_s=1$ ($|n_s-1|\sim {\cal O}(0.001)$) for $H_0\sim 73$km/s/Mpc. In this work, we propose a possibility to acquire $n_s=1$ in single field slow-roll models of inflation. In our consideration, the potential of inflaton during inflation still preserve the shape of well-known single field inflation models in deep slow-roll region, but inflation ends suddenly due to a large step of inflaton potential. In particular, we investigate the implication of our scheme for chaotic inflation and Starobinski inflation, and show how they can be compatible with the observation for $n_s=1$.
citation-role summary
background 2
citation-polarity summary
fields
astro-ph.CO 3years
2026 3verdicts
UNVERDICTED 3roles
background 2polarities
background 2representative citing papers
EDE models increase inferred α_s from CMB data, strengthening tension with USR PBH models that predict negative running.
Bayesian evidence calculation in warm inflation with fixed Υ = C_φ T³/φ² favors quartic over cubic and quadratic monomials by ΔlnZ_eff of -6.99 and -32.18 for N*=55.
citing papers explorer
-
Unifying Early and Late Dark Energy: Dynamical Requirements and Obstructions
Any unified early and late dark energy scenario with a single tracking scalar field requires a potential with three distinct slopes arranged in a steep-steeper-shallow hierarchy.
-
Running into tension: primordial black holes from ultra-slow-roll inflation, spectral running, and the Hubble tension
EDE models increase inferred α_s from CMB data, strengthening tension with USR PBH models that predict negative running.