[BUG] Unsupported Controlled QASM operations
维护者通常 1 天内回复
评估
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 新手友好度
- 18/100
- Issue 类型
- 功能
- 描述清晰度
- 基本清楚
- 活跃度
- 停滞
- 技术栈
- python
调研方向
The error comes from map_qasm_ctrl_op_to_callable, where a TODO notes that controls should be decomposed when not built in. Start by reading that function to see how controlled gates with three or more controls are currently rejected, and check the maintainers' linked issues #32, #121 and #125 for the intended design. Done means the reproducer gate Z_on_two3 with ctrl@ on three qubits validates and produces the expected operations, but the maintainers have not settled on a decomposition approach, so confirm direction in the thread first.
由索引模型根据 Issue 内容生成。
描述
Environment
- PyQASM version: 0.3.2
- Python version: 3.12.8
- Operating system: Windows
What happened?
This may be a feature request, but it looks like a partially stubbed implementation based on #32, #121, and #125.
When attempting to define and run a custom gate with multiple controls:
gate Z_on_two3 aa, ab, ac {
x ac;
ctrl(2) @ z aa, ab, ac;
x ac;
}
ctrl@ gate Z_on_two3 qb[0], qb[1], qb[2];
I encounter the following error:
ValidationError: Unsupported controlled QASM operation: z with 3 controls
Source
The error originates from map_qasm_ctrl_op_to_callable, which currently contains the following comment:
# TODO: decompose controls if not built in
Expected Behavior(?)
Support for decomposing multi-controlled operations (e.g., z with 3+ controls), or clarification on whether this is intentionally unsupported.
Suggestions (Optional)
IDK if this is a semantic decomposition or needs full function decomposition to base gate ie through Solavay Kiteav or Cartan. Id assume it can be left to a semantic decomp as openqasm parsing itself accepts gate modifiers directly. LMK future development intent in this category
- 主要语言
- Python
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- 2 天 4 小时
- 30 天内合并 PR
- 15
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