PennyLaneAI / PennyLaneAI/catalyst

`ppr-to-mbqc` pass does not support `qec.ppr.arbitrary` operations

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@sengthai is already working on this.

Since Jan 9, 2026.

enhancement
Dominant language
Python
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84
Avg merge
2d 15h
Merged PRs (30d)
66

Description

The ppr-to-mbqc pass currently only supports qec.ppr (fixed-angle) and qec.ppm operations. When encountering a qec.ppr.arbitrary operation, it emits an error: Unsupported qec.ppr.arbitrary operation.

The pass should lower qec.ppr.arbitrary operations to MBQC-style gate sequences, similar to how it handles fixed-angle PPR operations.

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