Bargmann-Orientation Classification of Qubit Pairs with Identical Fixed-Anchor Fidelities on IBM Quantum Hardware: Data, Code and Revised Manuscript

This dataset accompanies the manuscript “Bargmann-Orientation Classification of Qubit Pairs with Identical Fixed-Anchor Fidelities on IBM Quantum Hardware” by Ekther Jahan and Md. Hasibul Hassan Himal. The study benchmarks preservation of the imaginary sign of a third-order Bargmann invariant under finite sampling and superconducting-device noise. Conjugate qubit pairs have identical selected fixed-anchor fidelities but opposite orientation signs. A standard cycle-test estimator produces 20/20 and 39/40 correct unique-state decisions in two locked hardware benchmarks. The analysis examines readout correction, margin-dependent errors, repeated-job agreement, and residual bias. The package contains the revised manuscript and supplementary information, editable LaTeX sources, figures, archived hardware counts, benchmark definitions, offline analysis code, dependency specifications, tests, verification reports, and file checksums. Historical evidence archives retain their original contents and metadata; the current manuscript has two authors. The contribution is a controlled hardware benchmark of an established estimator. It does not establish measurement advantage or learned predictive generalization. For the known anchors, direct Pauli-Y measurement implements the same ideal decision boundary more cheaply. Original compiled hardware workload exports are unavailable; the supplied materials support offline count-analysis reproduction rather than exact reconstruction of native hardware execution. Original BSQC data and documentation are licensed under CC BY 4.0, and original BSQC software under the MIT License, subject to the included notices and third-party terms.