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$\begingroup$ You want to look up standard circuits for the controlled-controlled-NOT gate (also called Toffoli). It's Fig. 4.9 in my version of Nielsen & Chuang. To convert into a controlled-controlled-phase gate, just stick a Hadamard on the target qubit both before and after (or, if there are Hadamards already at either end, just remove them). $\endgroup$

DaftWullie
– DaftWullie

2018-06-01 15:30:54 +00:00
Commented Jun 1, 2018 at 15:30

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