Implementation of a remote three-qubit controlled-Z gate for atoms separately trapped in cavities coupled by optical fibres
Yan‐Ling Li, Mao-Fa Fang, Xing Mao Xiao, Chao Wu · Journal of Physics B Atomic Molecular and Optical Physics · 2010
We propose a scheme for implementing a remote three-qubit controlled-Z gate with three atoms separately trapped in three distant cavities coupled by optical fibres. The influences of various decoherence processes, such as spontaneous emission of the atoms and photon leakage of the cavities and the optical fibres, on the fidelity are also investigated. It is found that the gate can be implemented with high fidelity even when these decoherence processes are considered. This scheme can be extended to the implementation of a remote N -qubit controlled-Z gate with N atoms separately trapped in N distant cavities coupled by optical fibres.