Manuscripts from the SCPN-Quantum-Control programme — the software and experimental record behind the Kuramoto–XY quantum-control work. Each is downloadable here and archived on Zenodo with its own DOI. The set is deliberately evidence-governed: it includes the positive DLA-parity hardware observation alongside a hardware falsification and a negative control experiment, reported with explicit claim boundaries rather than headline claims.
The dynamical Lie algebra of the XY Hamiltonian on $n$ qubits splits under the parity operator into two equal blocks. In a 342-circuit campaign on IBM ibm_kingston, the parity-labelled sectors show a measurable leakage asymmetry under decoherence — peak $+17.5\%$ at depth 6, combined $p \ll 10^{-16}$. The paper is deliberately conservative about mechanism: the promoted claim is parity-sector and excitation-number correlated, not DLA-parity alone, and a second-backend control finds mixed signs. The full dataset, statistics, and an in-browser recompute of the headline number are on the results page.
A Kuramoto–XY synchronisation study with heterogeneous natural frequencies, simulator baselines, and ledgered IBM Heron r2 evidence. A Rust/PyO3-assisted pipeline computes entanglement entropy, Krylov complexity, OTOC scrambling, and Floquet discrete-time-crystal diagnostics for 2–16 qubits; the finite-size diagnostics are consistent with Berezinskii–Kosterlitz–Thouless scaling in the small systems studied. Legacy hardware rows are cited by committed artefact path rather than as aggregate validation.
The software and experimental workflow behind scpn-quantum-control: mapping heterogeneous Kuramoto-type oscillator networks to XY spin Hamiltonians, compiling topology-informed variational ansätze, benchmarking classical and quantum simulation paths, and running reproducible NISQ hardware experiments. Python/Qiskit orchestration is combined with a Rust/PyO3 acceleration layer for hot-path kernels. The paper does not promote the topology-informed ansatz as hardware-general superior — it characterises where its inductive bias helps and where it does not.
A collective Fisher-information-inspired magnetisation-feedback term is added to the heterogeneous XY Hamiltonian: a diagonal term proportional to $-\lambda\,M^2/n$ that shifts magnetisation-sector energies without breaking the magnetisation conservation of the ideal XY model. Exact diagonalisation on $n = 4, 6, 8$ characterises the small-system structure, and the hardware test is reported as a falsification rather than a protection claim — the boundary is preserved honestly.
Parity-sector leakage asymmetry is a useful observable only if its mechanism can be separated from layout, prepared-state, and readout artefacts. This is a cost-bounded reduced-Pauli entanglement/tomography check for the promoted DLA-parity and Fisher-information-modified circuit families: 162 main circuits on ibm_marrakesh with physical qubits $[1,2,3,4]$, 2048 shots per main circuit. It is closer to targeted local-observable estimation than to full tomography, and reports where the resulting deviations from exact references are largest.
Dynamic circuits allow monitored quantum-control policies to be tested on gate-model hardware. This preregistered four-qubit experiment on ibm_kingston pairs a monitored-feedback arm against a matched open-loop control across three dynamic rounds. The preregistered binary synchronisation endpoint is negative: the feedback arm does not improve on the matched control. The scientific value is methodological — a preregistered, backend-checked control-boundary result, reported as such rather than promoted into a controller claim.
Every manuscript above carries its own Zenodo DOI (linked on each entry). The software framework itself is archived at Zenodo 10.5281/zenodo.18821929, and the framework-level SCPN Master Publications at Zenodo 10.5281/zenodo.17419678. Source code is under AGPL-3.0 at github.com/anulum/scpn-quantum-control. Author: Miroslav Šotek (ORCID 0009-0009-3560-0851).