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quant-ph2003★ 11 cited
The simplified Toffoli gate implementation by Margolus is optimal
Guang Song, Andreas Klappenecker
Unitary operations are expressed in the quantum circuit model as a finite sequence of elementary gates, such as controlled-not gates and single qubit gates. We prove that the simpl…
quant-ph2002
Optimal Realizations of Controlled Unitary Gates
Guang Song, Andreas Klappenecker
The controlled-not gate and the single qubit gates are considered elementary gates in quantum computing. It is natural to ask how many such elementary gates are needed to implement…