C021 - Fig. 2a: applying up to 16 cycles to a range of initial states drives the measured fideli...
Verdict: data_unavailable (data_unavailable)
Location: Fig. 2a
Type / expected artifact: plot / figure (protocol_performance.pdf)
Claim: Fig. 2a: applying up to 16 cycles to a range of initial states drives the measured fidelity toward |Psi^->, with fidelity differences between input states decaying exponentially but still resolvable after 16 cycles.
Models: extraction claude-opus-4-8; verification gpt-5; verification_chain claude-opus-4-8 -> gpt-5; verdict_chain data_unavailable -> data_unavailable.
Limitations: data_unavailable.
Source location(s): source/main.tex:127-132 (Fig. 2a).
Conclusion
Fig 2a is MEASURED fidelity vs cycles for several initial states. No raw experimental data or data/code link exists (inventory.json), so the measured convergence curves cannot be reproduced. figure.png is an illustrative simulated overlay only. Claim concerns measured data -> data_unavailable.
Verification details
Executable rerun: run.py exited 0 in 0.751s; log verification/C021/attempts/R002/run.log.
Output excerpt:
simulated lambda_max=0.8770, N0=7.62 (context only)
NOTE: Fig 2a shows MEASURED fidelities; raw data unavailable -> not reproducible.
wrote figure.png (illustrative simulation, NOT the paper's measured data)
Plot evidence:
Visual comparison notes: - Fig 2a plots the MEASURED singlet fidelity vs number of cycles (up to 16) for a range of experimentally prepared initial states. No raw experimental data and no data/code link exist for this work (inventory.json), so the measured curves cannot be reproduced and the claim cannot be verified. - The reproduced figure.png contains only an ILLUSTRATIVE simulated convergence overlay (F(N)=1-C0*lambda_max^N, lambda_max=0.877) for several C0 to give visual context; it is NOT a reproduction of the paper's measured data. - No reproduction of the measured data was possible -> data unavailable. - Round-2 verifier reran the self-contained script where present and audited the modeled quantity; no new raw paper data was available.
