REVIEW 8 cited by
S-dual Quintessence, the Swampland, and the DESI DR2 Results
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
We propose a dark energy model in which a quintessence field $\phi$ rolls near the vicinity of a local maximum of its potential characterized by the simplest $S$ self-dual form $V(\phi) = \Lambda \ {\rm sech}(\sqrt{2} \, \phi/M_p)$, where $M_p$ is the reduced Planck mass and $\Lambda \sim 10^{-120} M_p^4$ is the cosmological constant. We confront the model with Swampland ideas and show that the $S$-dual potential is consistent with the distance conjecture, the de Sitter conjecture, and the trans-Planckian censorship conjecture. We also examine the compatibility of this phenomenological model with the intriguing DESI DR2 results and show that the shape of the $S$-dual potential is almost indistinguishable from the axion-like potential, $V (\phi) = m_a^2 \ f_a^2 \ [ 1 + \cos(\phi/f_a)]$, with $m_a$ and $f_a$ parameters fitted by the DESI Collaboration to accommodate the DR2 data. The self-dual potential has the advantage that one starts at the self-dual point and this is a theoretical motivation, because as the universe cools off the $\mathbb{Z}_2$ symmetry gets broken leading to a natural rolling away from the symmetric point.
Forward citations
Cited by 8 Pith papers
-
Examining Quintessence Models with DESI Data
NEC-obeying hilltop and exponential quintessence models give at most marginal improvement over the cosmological constant against DESI 2024 data, and the prominent k=10 hilltop 'excellent mimic' claim is an artifact of...
-
Weinberg's theorem, phantom crossing and screening
Graviton-loop-induced screening forces single-field dilaton and chameleon dark energy models to keep their equation of state near -1, making observable phantom crossing impossible in this class.
-
Evolving Dark Sector and the Dark Dimension Scenario
A two-parameter fading dark sector model, with exponential dark energy potential and exponential dark matter mass, matches DESI DR2 plus supernova data and naturally yields apparent w<-1 phantom behavior.
-
Observational Constraints on Scalar Field--Matter Interaction in Weyl Integrable Spacetime
A Weyl Integrable Spacetime model with one extra parameter fits current late-time cosmological data slightly better than Lambda-CDM, with weak to moderate statistical preference.
-
Constraints on Barrow and Tsallis Holographic Dark Energy from DESI DR2 BAO data
Barrow and Tsallis holographic dark energy models fit DESI DR2 data but are disfavored by information criteria versus LambdaCDM and do not ease the Hubble tension.
-
Observational constraints on the modified cosmology inspired by string T-duality
Late-time data bound the T-duality zero-point-length coupling to β ≲ 10^-3, leaving ΛCDM statistically equivalent.
-
Constraint on Symmetric Teleparallel Gravity with Different Dark energy Parametrizations from DESI DR2 BAO Data
MCMC fits of CPL and BA dark energy parametrizations in power-law f(Q) gravity to DESI DR2 and prior BAO H(z) data find statistically competitive or better fits than Lambda-CDM.
-
Topological defects as effective dynamical dark energy
A few percent domain-wall component gives a mild (Δχ² = -1.72) improvement over ΛCDM when fitting DESI DR2 BAO and DESY5 supernovae, but the evidence is inconclusive.
Discussion (0). Sign in to comment.