Fix Exp on qubit arrays larger than 2 with single PauliI
#2086
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This fixes a bug in the decomposition for `Exp` that would cause a runtime failure if an array of more than two qubits was used and a single `PauliI` was passed in the Pauli array. The decomposition ignores `PauliI` by calling the `RemovePauliI` helper function, but then incorrectly uses the original arrays when rather than the filtered arrays in the rest of the operation. This adds a test to confirm the fix (without the fix the test triggers a runtime failure in `MapPauli`).
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Change in memory usage detected by benchmark. Memory Report for 737b02b
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DmitryVasilevsky
approved these changes
Jan 2, 2025
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Wow! Thanks! |
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This fixes a bug in the decomposition for
Expthat would cause a runtime failure if an array of more than two qubits was used and a singlePauliIwas passed in the Pauli array. The decomposition ignoresPauliIby calling theRemovePauliIhelper function, but then incorrectly uses the original arrays when rather than the filtered arrays in the rest of the operation. This adds a test to confirm the fix (without the fix the test triggers a runtime failure inMapPauli).