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Fix TensoredOp.to_matrix with global coefficients #9404

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merged 4 commits into from
Jan 20, 2023

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Cryoris
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@Cryoris Cryoris commented Jan 20, 2023

Summary

Fixes #9398.

Details and comments

As the author of #9398 correctly pointed out, this is the analogous error fixed in #9283, where the global coefficient was multiplied with the matrix once per element in the tensored expression, when it should only be applied once.

@Cryoris Cryoris added Changelog: Bugfix Include in the "Fixed" section of the changelog mod: opflow Related to the Opflow module labels Jan 20, 2023
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@Cryoris Cryoris changed the title Fix TensoredOp.to_matrix Fix TensoredOp.to_matrix with global coefficients Jan 20, 2023
@Cryoris Cryoris added the stable backport potential The bug might be minimal and/or import enough to be port to stable label Jan 20, 2023
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coveralls commented Jan 20, 2023

Pull Request Test Coverage Report for Build 3969315247

  • 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
  • 1 unchanged line in 1 file lost coverage.
  • Overall coverage decreased (-0.08%) to 84.853%

Files with Coverage Reduction New Missed Lines %
src/vf2_layout.rs 1 86.44%
Totals Coverage Status
Change from base Build 3969313846: -0.08%
Covered Lines: 66228
Relevant Lines: 78050

💛 - Coveralls

@mergify mergify bot merged commit dc8e232 into Qiskit:main Jan 20, 2023
mergify bot pushed a commit that referenced this pull request Jan 20, 2023
* Fix TensoredOp.to_matrix

* added reno

* remove redundant size chec

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
(cherry picked from commit dc8e232)
mergify bot added a commit that referenced this pull request Jan 20, 2023
* Fix TensoredOp.to_matrix

* added reno

* remove redundant size chec

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
(cherry picked from commit dc8e232)

Co-authored-by: Julien Gacon <gaconju@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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Changelog: Bugfix Include in the "Fixed" section of the changelog mod: opflow Related to the Opflow module stable backport potential The bug might be minimal and/or import enough to be port to stable
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TensoredOp's to_matrix() returns a wrong value if coeff is not 1
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