Spin liquid in the Shastry–Sutherland model

Understanding the problem

Why it matters

Substantive evidence about an uncertain quantum phase and its gap, extending neural methods beyond reproducing small exactly solvable examples.

What counts as progress

A sourced analytical result, substantive numerical advance, or useful calculation method with its physical model, approximation, baseline, and AI contribution stated.

What to watch for

• Compare the same physical model, kinematic region, and approximation.
• Initial phase evidence was reported in November 2023; this record uses the expanded April 2025 version, which includes the spin-gap analysis. Variational finite-system calculations and extrapolations support a phase interpretation; they do not prove the infinite-system phase or confirm it experimentally in a material. Competing methods and extrapolation assumptions still matter. AIProofWatch has not reproduced the simulations.
• Track independent checks and subsequent corrections separately from importance.

Background review: 2026-10-13. Selected sources:

• Original transformer wave-function study, revised April 2025
• Variational calculations and finite-size analysis
• Physical Review B 111, 134411 (2025)
• Initial phase-evidence report, November 2023