wai-quantum 0.6.9: cut-rank amplitudes with the circuit's own global phase #350
2026-10-20
wai-quantum 0.6.9: cut-rank amplitudes with the circuit's own global phase
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PhasedTableau tracks one basis state of a stabilizer state's support and its
exact amplitude (2^{-k/2} e^{iπm/4}) through every gate; a Hadamard reads the
stabilizer whose X part is the one qubit. ProductMeasured gains with_last and
scale. The service's cutrank method scales its amplitudes by e^{iΘ} a/b (the
lowering's dropped phase, the tracked amplitude, the graph form's at the same
basis state), so they carry the circuit's own global phase; auto tries cutrank
for amplitudes. Tests against the dense state vector, phase included; three
mutants caught. Version 0.6.9 in every lockfile that pins it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>