Swap gate and controlled swap gate based on a single resonant interaction with cavity quantum electrodynamics
Xiao‐Qiang Shao, Li Chen, Shou Zhang, Yongfang Zhao · Physica Scripta · 2009
A scheme for implementing a swap gate is proposed with atoms sent through a microwave cavity. This scheme can be directly generalized to realize the controlled swap gate through appropriate changes of the coupling constants between the atoms and cavity. Moreover, an N -qubit controlled swap gate can be achieved without changing the gating time as the number of qubits increases.