[1] Molmer K, Srensen A. Multiparticle entanglement of hot trapped ions [J]. Phys. Rev. Lett., 1999, 82(9): 1835-1838.

[2] Wang Chengzhi, Fang Maofa. Quantum entanglement in a two-dimensional ion trap [J]. Chinese Physics, 2003, 12(3): 287-293.

[4] Xiang Saohua. Temperture effects on thermal entanglement in multi-photon Jaynes-Cummings model [J]. Journel of Huaihua University, 2004, 23(5): 22-25.

[5] Rauschenbeutel A, Bertet P, Osnaghi S, et al. Controlled entanglement of two field modes in a cavity quantum electrodynamics experiment [J]. Phys. Rev. A, 2001, 64: 050301(R) 1-4

[6] Rauschenbeutel A, Nogues G, Osnaghi S, et al. Step-by-step engineered multiparticle entanglement [J]. Science, 2000, 288: 2024-2028.

[7] Hagley E, Maitre X, Nogues G, et al. Generation of Einstein-Podolsky-Rosen pairs of atoms [J]. Phys. Rev. Lett., 1993, 79(1): 1-5.

[8] Zeng Ke, Fang Maofa. Quantum entanglement in the system of two two-level atoms interacting with a single-mode vacuum field [J]. Chinese Physics, 2005, 14(10): 2010-2013.

[10] Ling Yinsheng. Channel’s concurrence and quantum teleportation [J]. Commun. Theor. Phys., 2005, 43(1): 55-58.

[11] Peng Jinsheng, Li Gaoxiang. Introduction of Modern Quantum Optics [M]. Beijing: Science Press, 1996. 410-411.

[12] Wang Xiaoguang. Entanglement in the quantum Heisenberg XY model [J]. Phys. Rev. A, 2001, 64: 012313 (1-7).