Switch `SubtractFrom` to use `BitwiseNot`

quantumlib / Qualtran

Qᴜᴀʟᴛʀᴀɴ is a Python library for expressing and analyzing Fault Tolerant Quantum algorithms.

https://qualtran.readthedocs.io/en/latest/

Apache License 2.0

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Closed charlesyuan314 closed 3 months ago

charlesyuan314 commented 3 months ago

Switch the implementation of SubtractFrom to use BitwiseNot rather than Negate to save some Toffolis as per suggestion.