title: Effective W-state fusion strategies for electronic and photonic qubits via the quantum-dot-microcavity coupled system.
abstract: We propose effective fusion schemes for stationary electronic W state and flying photonic W state, respectively, by using the quantum-dot-microcavity coupled system. The present schemes can fuse a n-qubit W state and a m-qubit W state to a (m + n - 1)-qubit W state, that is, these schemes can be used to not only create large W state with small ones, but also to prepare 3-qubit W states with Bell states. The schemes are based on the optical selection rules and the transmission and reflection rules of the cavity and can be achieved with high probability. We evaluate the effect of experimental imperfections and the feasibility of the schemes, which shows that the present schemes can be realized with high fidelity in both the weak coupling and the strong coupling regimes. These schemes may be meaningful for the large-scale solid-state-based quantum computation and the photon-qubit-based quantum communication.
authors.affiliation: Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Han
authors.affiliation: Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China.
authors.forename: Shi
authors.initials: S
authors.lastname: Hu
authors.affiliation: Department of Physics, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Guo
authors.affiliation: Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China.
authors.forename: Hong-Fu
authors.initials: HF
authors.lastname: Wang
authors.affiliation: Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China.
authors.forename: Ai-Dong
authors.initials: AD
authors.lastname: Zhu
authors.affiliation: Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China.
authors.forename: Shou
authors.initials: S
authors.lastname: Zhang