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In this brief report, we propose a circuit which is locally equivalent to arecently proposed universal two-qubit quantum circuit involving twoapplications of special perfect entanglers (SPEs) and local y-rotations.Further, we discuss a scheme to implement the equivalent circuit usingcross-resonance Hamiltonian. We implement the B-gate circuit using a CNOT gateand a \sqrt{\text{CNOT}} gate. This requires the implementation time which isapproximately 64.84% of the time required to implement the same gate using twoCNOT gates. We also show that (n - 1) applications of B-gate can generate boththe n-qubit GHZ state and n-qubit perfect W state.

A Scheme to Implement a Universal Two-Qubit Quantum Circuit using Cross-Resonance Hamiltonian