Efficient entanglement concentration for partially entangled cluster states with weak cross-Kerr nonlinearity
作者： Huan-Juan Liu , Lin-Lin Fan , Yan Xia , Jie Song
DOI: 10.1007/S11128-015-1029-6
关键词: Quantum entanglement 、 Squashed entanglement 、 Physics 、 Cluster state 、 Photon 、 Quantum mechanics 、 Cluster (physics) 、 Multipartite entanglement 、 Quantum information science 、 Quantum computer
摘要: In this paper, we propose an optimal entanglement concentration protocol (ECP) for partially entangled cluster states with the help of weak cross-Kerr nonlinearity. We can obtain maximally assisted projection measurements on additional photons. The is based optical elements, single polarization photons, nonlinearity, and conventional photon detectors, which are feasible existing experimental technology. Numerical simulation demonstrates that by iterating process $$n=m=6$$n=m=6 times, ECP has approximate maximal success probability 100 %. Moreover, present also suitable $$4N$$4N-photon concentration. All these advantages make more efficient convenient than others in applications quantum communication.
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