The generation of various entangled states is an essential task in quantum information processing. Recently, a scheme (PRA 79, 022304) has been suggested for generating Greenberger-Horne-Zeilinger state and cluster state with atomic ensembles based on the Rydberg blockade. Using similar resources as the earlier scheme, here we propose an experimentally feasible scheme of preparing arbitrary four-qubit W class of maximally and non-maximally entangled states with atomic ensembles in a single step. Moreover, we carefully analyze the realistic noises and predict that four-qubit W states can be produced with high fidelity (F~0.994) via our scheme.
The generation of various entangled states is an essential task in quantum information processing. Recently, a scheme (PRA 79, 022304) has been suggested for generating Greenberger-Horne-Zeilinger state and cluster state with atomic ensembles based on the Rydberg blockade. Using similar resources as the earlier scheme, here we propose an experimentally feasible scheme of preparing arbitrary four-qubit W class of maximally and non-maximally entangled states with atomic ensembles in a single step. Moreover, we carefully analyze the realistic noises and predict that four-qubit W states can be produced with high fidelity (F~0.994) via our scheme.
(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
引用本文:
HAN Yang;WU Chun-Wang;GAO Ming;LIANG Lin-Mei;CHEN Ping-Xing;LI Cheng-Zu. Preparation of Arbitrary Four-Qubit W State with Atomic Ensembles via Rydberg Blockade[J]. 中国物理快报, 2010, 27(4): 40307-040307.
HAN Yang, WU Chun-Wang, GAO Ming, LIANG Lin-Mei, CHEN Ping-Xing, LI Cheng-Zu. Preparation of Arbitrary Four-Qubit W State with Atomic Ensembles via Rydberg Blockade. Chin. Phys. Lett., 2010, 27(4): 40307-040307.
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2010, Vol. 27 
