Data and code for: High-K structure and driven K-mixing of 66Fe on Heron-r2 qubits

Analysis code, hardware run records, exact-diagonalization references, and derived data reproducing the results of the associated article (submitted to Physical Review C, 2026): sample-based Krylov quantum diagonalization (SKQD) reconstruction of the 66Fe high-K yrast band on the IBM Heron-r2 processor ibm_marrakesh, cross-validated against classical KSHELL shell-model calculations; a quantum- versus classically-selected subspace comparison; and driven K-mixing dynamics with an error-mitigation methodology study (compound-sea suppression of few-level triggering, shallow-depth hardware reconstruction of the driven observable, and an identifiability analysis of postselection-based mitigation). Includes a README mapping each table and figure to the corresponding data file and script, a MANIFEST with SHA-256 checksums, and an independent verification script. Code is released under the MIT License and data under CC-BY-4.0. No claim of quantum advantage is made; all target values are classically computable. Version 1.1 (2026-10-06): (i) label correction: the KSHELL runs in data/fe66_gxpf1a/ use the interaction gxpf1b_g9d5_2c (see FN_INT in each log); no GXPF1A calculation was performed, and the version-1.0 description of these runs as a GXPF1A+g9/2 baseline and an independent cross-check was wrong; folder names are kept so that references resolve. (ii) code/fs38_p2_verify.py and code/fs38_build_f2q_json.py locate data/ relative to the script (v1.0 had a hard-coded absolute path). No data file changed.