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Fix CommutationChecker for 2q Pauli rotations #13762

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merged 4 commits into from
Feb 6, 2025
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@Cryoris Cryoris commented Jan 30, 2025

Summary

Fixes #13742.

Details and comments

Fix a bug CommutationChecker for [2q Pauli rotations, a gate that is not in the cache], such as [RXX, U]. The issue was that the parameters of the Pauli rotations were set to [] because we assumed we can find the relation in the cache. However that's obviously not true, as there are gates that are neither rotations, nor in the cache.

@Cryoris Cryoris added stable backport potential The bug might be minimal and/or import enough to be port to stable Changelog: Bugfix Include in the "Fixed" section of the changelog labels Jan 30, 2025
@Cryoris Cryoris added this to the 1.4.0 milestone Jan 30, 2025
@Cryoris Cryoris requested a review from a team as a code owner January 30, 2025 14:58
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coveralls commented Jan 30, 2025

Pull Request Test Coverage Report for Build 13115566069

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

Details

  • 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
  • 293 unchanged lines in 6 files lost coverage.
  • Overall coverage decreased (-0.1%) to 88.814%

Files with Coverage Reduction New Missed Lines %
crates/accelerate/src/sparse_observable.rs 3 94.33%
crates/qasm2/src/lex.rs 3 92.48%
crates/circuit/src/circuit_data.rs 3 94.94%
crates/qasm2/src/parse.rs 12 97.15%
crates/circuit/src/interner.rs 131 42.74%
crates/circuit/src/dag_circuit.rs 141 89.38%
Totals Coverage Status
Change from base Build 13053673557: -0.1%
Covered Lines: 79759
Relevant Lines: 89805

💛 - Coveralls

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LGTM! I just left a small comment in the test.

test/python/circuit/test_commutation_checker.py Outdated Show resolved Hide resolved
@1ucian0 1ucian0 assigned 1ucian0 and ElePT and unassigned 1ucian0 Feb 4, 2025
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LGTM

@ElePT ElePT added this pull request to the merge queue Feb 6, 2025
Merged via the queue into Qiskit:main with commit 78e6d3d Feb 6, 2025
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mergify bot pushed a commit that referenced this pull request Feb 6, 2025
* Fix ``CommutationChecker`` for 2q rotations + non-cached gates

* add reno

* compensate for the inability to copy+paste

(cherry picked from commit 78e6d3d)
github-merge-queue bot pushed a commit that referenced this pull request Feb 6, 2025
* Fix ``CommutationChecker`` for 2q rotations + non-cached gates

* add reno

* compensate for the inability to copy+paste

(cherry picked from commit 78e6d3d)

Co-authored-by: Julien Gacon <[email protected]>
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Error when Executing CommutativeInverseCancellation Pass in Qiskit v1.3.2
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