Round 2 verification audit for C010

Model: gpt-5

Claim: Drive (A) uses a bichromatic 729 nm field with two components detuned by delta = +/- 2 pi x 14.7 kHz from the red and blue motional sidebands of |down><->|e>, using the axial stretch mode at omega_m ~= 2 pi x 2.4 MHz with Lamb-Dicke parameter eta = 0.026.

Source alignment: source/main.tex:115-115 (Experiment)

Prior official verdict: partial with failure_reason None.

Executable evidence: run.py. Sandbox rerun logs: run.log.

Independent audit: I scanned the copied script for imports/shared helper dependencies and reran it through the sandbox. The code is self-contained in this attempt directory and targets the claim strategy: Verify internal consistency of the Lamb-Dicke parameter with the stretch-mode frequency and 729 nm wavelength for 40Ca+, and that delta is consistent with the stated drive timings.. I checked the relevant family model rather than relying only on exit status; the rerun is treated as one reproducibility input.

Decision: Round 2 verdict is partial with failure_reason None and limitations ['paper_text_only_reimplementation']. Notes: Paper: eta=0.026 for axial stretch mode omega_m=2pi2.4MHz, 729nm 40Ca+. Lamb-Dicke eta=k sqrt(hbar/(2 m_eff omega)) gives 0.0626 (single-ion mass m) or 0.0442 (stretch effective mass 2m), both with laser along axis. To match 0.026 requires a beam-axis projection cos(theta)~0.42 (single) or ~0.59 (stretch) — a geometry assumption from the setup not fixed by the claim's own quantities. delta=2pi14.7kHz consistent (t=2*2pi/delta=136us). Internally consistent only via an unstated projection -> partial.