Implementing a conditional z gate by a combination of resonant interaction and quantum interference
Xu‐Bo Zou, Yuli Dong, Guang‐Can Guo · Physical Review A · 2006
We first propose an experimental scheme to implement a two-qubit conditional $z$ gate with atoms trapped in a high-$Q$ optical cavity. The scheme is based on a combination of resonant interaction and quantum interference. Further, we show that the scheme can be directly generalized to implement an $N$-qubit conditional $z$ gate, and the interaction time required to implement scheme does not change with increasing the number of qubits. This might lead to more efficient construction of quantum circuits and quantum algorithms.