CLS-8340: cap maxwell_2d_simulation width at 25 for the new synthesis flow#1618
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CLS-8340: cap maxwell_2d_simulation width at 25 for the new synthesis flow#1618din-carmon wants to merge 1 commit into
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… flow The new synthesis flow does not reuse the block-encoding ancillas the way the legacy flow does, so synthesizing maxwell_2d_simulation with an effectively unbounded max_width (1000) produced a ~411-qubit program and failed the notebook size check (expected_width=25). Constraining max_width to 25 makes the new flow reuse qubits and fit within the budget (resulting width 25), while remaining satisfiable for the legacy flow (which is already ~20). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Context
maxwell_2d_simulationsynthesizes withPreferences(symbolic_loops=True, transpilation_option=NONE)andConstraints(max_width=1000). Under the new synthesis flow, the block-encoding ancillas (LCU /within_apply/ GQSP) are not reused the way the legacy flow reuses them, so the program comes out at ~411 qubits and fails the notebook test'svalidate_quantum_program_size(expected_width=25).Change
Cap
max_widthat25inrun_simulation. This forces the new flow to reuse qubits and fit within budget (resulting width 25), and remains satisfiable for the legacy flow (already ~20). The algorithm and physics result are unchanged - only the qubit-allocation budget.Validation
Synthesized the real model in-process through the new flow (
RunNewSynthesis.ALWAYS):data.width= 25 (was 411)Note: this depends on the QASM-version-inference fix in Cadmium (CLS-8340) for the export path; the width cap addresses the separate size check.
🤖 Generated with Claude Code