Qiskit / qiskit / 9366573499

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github

Committed by web-flow

Commit Message

Avoid lossing precision when scaling frequencies (#12392) (#12480)

* Avoid lossing precision when scaling frequencies

Classes in pulse_instruction.py scale frequency values to GHz by
multipliying `ParameterExpression` with float 1e9. This can lead
to numerical errors on some systems using symengine. Instead, this
scaling can be done multiplying by integer 10**9.

See: https://github.com/Qiskit/qiskit/issues/12359#issuecomment-2104426621

* Add release note

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Co-authored-by: Jake Lishman <jake.lishman@ibm.com>
(cherry picked from commit 96607f6b2)

Co-authored-by: Iyán <me@iyanmv.com>
Co-authored-by: Luciano Bello <bel@zurich.ibm.com>

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