光学学报, 2012, 32 (2): 0227001, 网络出版: 2011-12-16   

双光子过程耦合腔系统中的纠缠特性

Entanglement Properties in the System of Atoms Interacting with Coupled Cavities via a Two-Photon Hopping Interaction
作者单位
武夷学院电子工程系, 福建 武夷山 354300
摘要
研究了双光子过程原子与耦合腔相互作用系统,给出了系统总激发数等于2时态矢的演化。采用负本征值来描述两个子系统间的纠缠,利用数值计算方法研究了系统中原子与原子间、腔场与腔场间和原子与腔场间的纠缠特性。讨论了腔场间的耦合强度变化对纠缠特性的影响。研究结果表明:随着腔场间耦合的增强,两原子间的纠缠增强,但原子与腔场间和两腔场间的纠缠却减弱。
Abstract
Two identical cavities, each containing one two-level atom, coupled via a two-photon hopping interaction are considered. The evolution of the state vector of the system is given. Negativity is used to quantify the degree of entanglement. By means of numerical calculations, the temporal evolution in the entanglement between atoms, between cavities, as well as between the atom and the local cavity mode are investigated. The influence of cavity-cavity coupling coefficient on the entanglement is also discussed. The results show that the entanglement between atoms is strengthened, and that between cavities and that between the atom and the local cavity mode are weakened with the increase of cavity-cavity coupling coefficient.
参考文献

[1] Q. A. Turchette, C. J. Hood, W. Lange et al.. Measurement of conditional phase shifts for quantum logic [J]. Phys. Rev. Lett., 1995, 75(25): 4710~4713

[2] E. Hagley, X. Maitre, G. Nogues et al.. Generation of Einstein-Podolsky-Rosen pairs of atoms [J]. Phys. Rev. Lett., 1997, 79(1): 1~5

[3] S. Osnaghi, P. Bertet, A. Auffeves et al.. Coherent control of an atomic collision in a cavity [J]. Phys. Rev. Lett., 2001, 87(3): 037902

[4] A. Rauschenbeutel, G. Nogues, S. Osnaghi et al.. Step by step engineered many particle entanglement [J]. Science, 2000, 288(5473): 2024~2028

[5] A. Rauschenbeutel, G. Nogues, S. Osnaghi et al.. Coherent operation of a tunable quantum phase gate in cavity QED [J]. Phys. Rev. Lett., 1999, 83(24): 5166~5169

[6] S. B. Zheng, Z. B. Yang, Y. Xia. Generation of two-mode squeezed states for two separated atomic ensembles via coupled cavities [J]. Phys. Rev. A, 2010, 81(1): 015804

[7] Z. Q. Yin, F. L. Li. Multiatom and resonant interaction scheme for quantum state transfer and logical gates between two remote cavities via an optical fiber [J]. Phys. Rev. A, 2007, 75(1): 012324

[8] Z. B. Yang, Y. Xia, S. B. Zheng. Resonant scheme for realizing quantum phase gates for two separate atoms via coupled cavities [J]. Opt. Commun., 2010, 283(15): 3052~3057

[9] 刘小娟, 周并举, 方卯发 等. 双光子过程中任意初态原子的信息熵压缩 [J]. 物理学报, 2006, 55(2): 704~711

    Liu Xiaojuan, Zhou Bingju, Fang Maofa et al.. Information entropy squeezing of the atom of an arbitrary initial state via the two-photon process [J]. Acta Physica Sinica, 2006, 55(2): 704~711

[10] 许静平, 羊亚平. 压缩态光场变耦合系数双光子J-C模型性质 [J]. 光学学报, 2005, 25(2): 251~255

    Xu Jingping, Yang Yaping. The time-dependent atom-field coupling J-C model with an initial squeezing state: two-photon process [J]. Acta Optica Sinica, 2005, 25(2): 251~255

[11] M. Alexanian. Two-photon exchange between two three-level atoms in separate cavities [J]. Phys. Rev. A, 2011, 83(2): 023814

[12] 卢道明. 原子与耦合腔相互作用系统中的纠缠特性[J]. 物理学报, 2011, 60(9): 090302

    Lu Daoming. Entanglement properties in the system of atoms interacting with coupled cavities [J]. Acta Physica Sinica, 2011, 60(9): 090302

卢道明. 双光子过程耦合腔系统中的纠缠特性[J]. 光学学报, 2012, 32(2): 0227001. Lu Daoming. Entanglement Properties in the System of Atoms Interacting with Coupled Cavities via a Two-Photon Hopping Interaction[J]. Acta Optica Sinica, 2012, 32(2): 0227001.

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