A CCCZ gate performed with 6 T gates

Abstract

We construct a CCCZ gate using six T gates, assisted by stabilizer operations and classical feedback. More generally, we reduce the T cost of a $C^{n}Z$ gate from $4n-4$ to $4n-6$, for $n>2$.

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References in corpus (1)

• Novel constructions for the fault-tolerant Toffoli gate