Improved Quantum Cost for n-bit Toffoli Gates

Details Improved Quantum Cost for n-bit Toffoli Gates Improved Quantum Cost for n-bit Toffoli Gates

2004-03-05

arxiv.org/abs/quant-ph/0403053v1

IEE Electronics Letters, 39(25):1790-1791, December 2003

Physics

Quantum Physics

Scientific paper

10.1049/el:20031202

We present an n-bit Toffoli gate quantum circuit based on the realization proposed by Barenco, where some of the Toffoli gates in their construction are replaced with Peres gates. This results in a significant cost reduction. Our main contribution is a quantum circuit which simulates the (m+1)-bit Toffoli gate with 32m-96 elementary quantum gates and one garbage bit which is passed unchanged. This paper is a corrected and expanded version of our recent journal publication.

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