Uncomputation

Creating a NOT gate with five controls out of Toffoli gates and ancilla bits. Uncomputation is used to restore the ancilla bits to the OFF state before finishing.

Uncomputation is a technique, used in reversible circuits, for cleaning up temporary side effects on ancilla bits so they can be re-used.[1]

Uncomputation is important to quantum computing. Whether or not intermediate effects have been uncomputed affects how states interfere with each other when measuring results.[2]

References

  1. ^ Aaronson, Scott; Grier, Daniel; Schaeffer, Luke (2015). "The Classification of Reversible Bit Operations". arXiv:1504.05155free to read [quant-ph]. 
  2. ^ Aaronson, Scott (2002). "Quantum Lower Bound for Recursive Fourier Sampling". Quantum Information and Computation ():, 00. 3 (2): 165–174. arXiv:quant-ph/0209060free to read. 


fonte: https://web.archive.org/web/20170403205616/https://en.wikipedia.org/wiki/Uncomputation