Fix pauli.evolve dtype casting error #8877
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mtreinish
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Changelog: Bugfix
jakelishman
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Oct 12, 2022
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| base_phase = np.mod(cls._phase_from_complex(op.coeff) + _count_y(base_x, base_z), 4) | ||
| base_phase = np.mod( | ||
| cls._phase_from_complex(op.coeff) + _count_y(base_x, base_z), 4, dtype=int | ||
| ) |
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I'm guessing this is int for consistency with other methods in this class?
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* Fix pauli phase evolve * Update for unsigned int phases Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> (cherry picked from commit e6d23d5)
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* Fix pauli phase evolve * Update for unsigned int phases Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> (cherry picked from commit e6d23d5) Co-authored-by: Christopher J. Wood <[email protected]>
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Summary
Fixes #8438
Fixes issue where
Pauli.evolveandPauliList.evolvewould raise a dtype error when evolving by certain Clifford gates which modified the Pauli's phase.Details and comments
This fix make it so that rather than cast the dtype of the phase vector to a fixed type, it will accept any signed or unsigned integer dtype and work with that.