Prépublication
· 2026 arXiv
EN
We study the cosmology of self-interacting ultralight dark matter. The scalar field evolves from an early Hubble-frozen phase to a quartic-dominated radiation-like phase and finally to a quadratic matter-like phase. The intermediate phase increases the pre-rec...
Seokcheon Lee, Jae-Weon Lee
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Many NP-complete (NPC) problems have a polynomial-time (P) twin that differs in a single structural detail, such as 3- versus 2-colouring a graph. A model that reasons rather than recalls should notice which side of this boundary a problem falls on, yet existi...
Nurul Labib Sayeedi, Md. Faiyaz Abdullah Sayeedi et al.
#cs.CL
Prépublication
· 2026 arXiv
EN
Perimeter triage faces a latency/semantics trade-off: signature engines are fast and format-safe but blind to unseen attacks, while generative models are semantic but slow and produce unparseable output. In late 2026 a class of commercial System One decision m...
Juan S. Santillana
#cs.CR
Prépublication
· 2026 arXiv
EN
Uncertainty in the terrestrial carbon cycle remains a major constraint in climate projections, partly due to imperfect land surface representations in Earth system models. We propose a data-driven framework for high-resolution land-use reconstruction, treated...
Amirpasha Mozaffari, Marina Castaño et al.
#physics.ao-ph
Prépublication
· 2026 arXiv
EN
Picture-description dementia classification uses a shared visual scene, but a transcript-level prediction alone does not identify the scene evidence underlying its inputs. NarraSpace links words and speech times to named picture elements and retrieves utteranc...
Qingming Li, Ruiyan Sun et al.
#cs.CL
Prépublication
· 2026 arXiv
EN
TS2Vec is one of the strongest self-supervised methods for time series classification, introduced in 2022. It is designed to be trained anew on every dataset: self-supervised pre-training followed by linear probing. Since then, the field has shifted towards fo...
Vasilii Feofanov, Zhenghan Tai et al.
#cs.LG
Prépublication
· 2026 arXiv
EN
Hot Jupiters are typically thought to be "lonely", but a small and growing subset of them have been found to have nearby planets in the same system. We present the discovery of a new member of this class of systems, TOI-3686. TOI-3686 c is a hot Jupiter with $...
Samuel W. Yee, Tarisai Dziire et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
Context. Short-term millimeter-wavelength variability in Class II young stellar objects (YSOs) has been considered minimal, often dismissed as very rare in ALMA-based studies on short timescales. However, recent findings suggest that variability on sub-day tim...
D. Krebs, A. Hacar et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
Significant efforts are currently being directed toward the implementation of large-scale quantum information processors, but realizing useful quantum advantage also requires the development of efficient quantum algorithms. While for many practical problems th...
Andi Gu, Alek H. Kemeny et al.
#quant-ph
Prépublication
· 2026 arXiv
EN
We present a homogeneous analysis of 268 confirmed and candidate transiting hot-Jupiter host stars with 4800K < Teff < 6200K. We combine high-resolution TRES spectra, Gaia, 2MASS and WISE photometry, and Gaia astrometry to determine these stars' Teff, log g, R...
Victoria DiTomasso, Samuel W. Yee et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
The CMB constrains the gravitational constant $G$ at recombination to a few percent of its laboratory value, but the effect of $G$ on recombination itself is usually absorbed into a global fit rather than made explicit. We return to the semi-analytic descripti...
Brahim Lamine, Sébastien Beauchamp et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Jupiter's faint ring system contains micron- and submicron-sized dust whose dynamics are influenced by the planet's rapidly rotating magnetic field. Optical observations have established the morphology of the main ring and halo, but tenuous dust close to Jupit...
Wenyu Zhang, Hao Cao et al.
#astro-ph.EP