Add representation of box
#13869
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Add representation of box
#13869
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jakelishman
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Changelog: New Feature
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This adds in the base `box` control-flow construction, with support for containing instructions and having a literal delay, like the `Delay` instruction. This supports basic output to OpenQASM 3, QPY and some rudimentary support in the text and mpl drawers. The transpiler largely handles things already, since control flow is handled generically in most places. Known issues: - QPY fails to round-trip the `unit` field from an instruction's duration. - We expect this to be able to accept stretches in its duration, just as `Delay` can, which will need a follow-up. - We expect `Box` to support "annotations" in a future release of Qiskit. - There is currently no way in OpenQASM 3 to represent a qubit that is idle during a `box` without inserting a magic instruction on it. - There's no support for import from OpenQASM 3 for `box` yet - that happens in different package (`qiskit-qasm3-import`) right now. - IBM backends don't claim support for `box` yet, so `transpile` against a backend will fail, though you can modify the `Target` to add the instruction manually.
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This adds in the base
boxcontrol-flow construction, with support for containing instructions and having a literal delay, like theDelayinstruction.This supports basic output to OpenQASM 3, QPY and some rudimentary support in the text and mpl drawers. The transpiler largely handles things already, since control flow is handled generically in most places.
Known issues:
unitfield from an instruction's duration.Delaycan, which will need a follow-up.Boxto support "annotations" in a future release of Qiskit.boxwithout inserting a magic instruction on it.boxyet - that happens in different package (qiskit-qasm3-import) right now.boxyet, sotranspileagainst a backend will fail, though you can modify theTargetto add the instruction manually.Summary
Details and comments
No tests yet, but I tested various things casually - this is just the WIP to show what's going on.
Close #13772.