One-step implementation of a multi-target-qubit controlled phase gate with cat-state qubits in circuit QED

You-Ji Fan, Zhen-Fei Zheng, Yu Zhang +2

We propose a single-step implementation of a muti-target-qubit controlled phase gate with one cat-state qubit (\textit{cqubit}) simultaneously controlling $n-1$ target \textit{cqub…