uncomputation

thumb|400px|Creating a logical conjunction of the five controls out of Toffoli gates and ancilla bits. Uncomputation is used to restore the ancilla bits to their original states before finishing.

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Instance of: technique

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used by: quantum computer

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thumb|400px|Creating a logical conjunction of the five controls out of Toffoli gates and ancilla bits. Uncomputation is used to restore the ancilla bits to their original states before finishing.

Uncomputation is a technique, used in reversible circuits, for cleaning up temporary effects on ancilla bits so that they can be re-used.

Excerpted from Wikipedia’s “uncomputation” article, available under the CC BY-SA 4.0 licence.