Round 2 verification audit for C011

Model: gpt-5

Claim: Drive (A) realizes the Hamiltonian H_A = (1/2) hbar eta Omega S_{x,e} (a e^{i delta t} + a^dag e^{-i delta t}), a Molmer-Sorensen-type force whose phase depends on the eigenstate of S_{x,e}.

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

Prior official verdict: verified with failure_reason None.

Executable evidence: none. Sandbox rerun logs: none.

Independent audit: No executable script was needed for this claim. I rechecked the source/citation/derivation evidence and preserved the prior judgment because the claim is supported by direct paper text or a simple derivation.

Decision: Round 2 verdict is verified with failure_reason None and limitations []. Notes: H_A = (1/2) hbar eta Omega S_{x,e}(a e^{i delta t}+a^dag e^{-i delta t}) is term-by-term the standard bichromatic Lamb-Dicke MS interaction restricted to {down,e} and promoted to the two-ion collective S_{x,e}. State-dependent displacement force confirmed by diagonalizing in the S_{x,e} eigenbasis. Definition/identification confirmed; C012 corroborates quantitatively.