Modifying $n$-qubit controlled-$ZX$ gate to be $n$-qubit Toffoli gate

Jian Leng, Fan Yang, Xiang-Bin Wang

The decomposition for controlled-$ZX$ gate in [Phys. Rev. A, 87, 062318 (2013)] has a shallow circuit depth $8n-20$ with no ancilla. Here we modify this decomposition to decompose…