量子电子学报, 2009, 26 (2): 223, 网络出版: 2010-05-24  

Kerr介质中二项式光场与级联三能级原子相互作用的场熵演化

Entropy evolution of field in system of cascade three-level atom interacting with binomial field in a Kerr-like medium
作者单位
太原科技大学物理系, 陕西 太原 030024
摘要
研究了在高 Q Kerr 介质腔中,级联三能级原子与二项式光场相互作用过程中场熵的演化特性。数值计算结果表明:当原子初 态处于非相干叠加态时, 附加 Kerr 介质可以提高场熵的值,使原子和光场之间的纠缠程度增强,超过一定值后场熵值反而会降低,纠缠程度减弱, 场熵振荡周期变长;当原子初态处于相干叠加态时,附加 Kerr 介质会降低场熵的值,原子和光场间的纠缠减弱,只有当介 质参数达到一定值后才能提高场熵值,增强纠缠,之后的演化规律和原子处于非相干叠加态时一致。
Abstract
The entropy evolution properties of the field in the system of a cascade three-level atom interacting with binomial field in a Kerr-like medium is studied. By numerical method, the results indicate when the atom initially in excited states, the field entropy increases with the increasing of Kerr coefficient, the quantum entanglement is improved too. However, the field entropy reduces when the parameter exceeds a certain value and the period of field entropy becomes longer. When the atom initially in levels’ superposition states, the field entropy reduces with the effect of Kerr effect and the entanglement between atom and optical field becomes lower. The field entropy could be improved unless the parameter exceeds a certain value. Then the law is the same as the case of the atom initially in excited states with the increasing of Kerr coefficient.
参考文献

[1] . Can quantum-mechanical description of physical reality be considered complete[J]. Phys. Rev., 1935, 47(10): 777-780.

[2] . Einstein-Podolsky-Rosen correlated atomic ensembles[J]. Phys. Rev. A, 1999, 59(6): 4202-4205.

[3] . Robust creation of entanglement between ions in spatially separate cavities[J]. Phys. Rev. Lett., 2003, 91(6): 067901.

[4] . Coherence versus incoherence: Collapse and revial in a simple quantum model[J]. Phys. Rev. A, 1981, 23: 236-247.

[5] . Observation of quantum collapse and revival in an one-atom maser[J]. Phys. Rev. Lett., 1987, 58: 353-356.

[6] Huang Yanxia, Guo Guangcan. Evolution properties of field entropy of Jaynes-Cummings model in squeezed vacuum [J]. Acta Sinica Quantum Optica (量子光学学报), 1996, 2 (2): 97-104 (in Chinese).

[7] Liu Xiang, Fang Maofa, Liu Anling. Entropy properties of the type three-level atom in uncoupled two modes [J]. Chinese Journal of Quantum Electronics (量子电子学报), 2002, 19 (1): 43-47 (in Chinese).

[8] . Binomial states of the quantized radiation field[J]. Opt. Acta, 1985, 32(3): 345-355.

[9] . Quantum nondemoliton measurement of the photon number via the optical Kerr effect[J]. Phys. Rev. A, 1985, 32(4): 2287-2292.

[10] . Effect of Kerr-like medium on atomic level-occupation probability[J]. Optics Communications, 2000, 186: 303-309.

[11] Huang Yanxia, Zhao Pengyi, Huang Xi. Entanglement and disentanglement in the nonlinear interaction between squeezing vacuum state field and atom [J]. Acta Physica Sinica (物理学报), 2004, 53 (1):75-81 (in Chinese).

[12] Zhang Lihui, Li Gaoxiang, Gan Zhongwei. Evolution of the entropy of a two-mode field interacting with a casade three-level atom system [J]. Acta Physica Sinica (物理学报), 2003, 52 (5): 1168-1173 (in Chinese).

[13] Chen Aixi, Zhang Zengchang. Binomial field interacting with atom inside a high-Q cavity filled with a Kerr medium [J]. Acta Photonica Sinica (光子学报), 2003, 32 (10): 123-126 (in Chinese).

[14] Wang Chengzhi, Fang Maofa. Entanglement and decoherence in the interaction between two-mode squeezing vacuum state field and atom [J]. Acta Physica Sinica (物理学报), 2002, 51 (9): 1989-1994 (in Chinese).

[15] Liu Xiang, Fang Maofa, Liu Anling. Entropy properties and schr dinger-cat states of the field interacting with a type three-level atom [J]. Acta Physica Sinica (物理学报), 2000, 49 (9): 1707-1712 (in Chinese).

[16] . Field statistics in some generalized Jaynes-Cummings models[J]. Phys. Rev. A, 1982, 25: 206-216.

[17] . Entropy as measure of quantum optical correlation[J]. Phys. Rev. A, 1989, 40(5): 2404-2409.

[18] Zeng Jinyan. Advances in Quantum Mechanics (量子力学新进展) [M]. Beijing: Tsinghua University Press, 2003, 189-255 (in Chinese).

[19] Hu Yaohua, Fang Maofa, Liu Xiangping. Quantum entanglement of the binomial field interacting with a cascade three-level atom [J]. Acta Physica Sinica (物理学报), 2006, 55(9): 4631-4637 (in Chinese).

郭云香, 王青狮, 赖云忠. Kerr介质中二项式光场与级联三能级原子相互作用的场熵演化[J]. 量子电子学报, 2009, 26(2): 223. GUO Yun-xiang, WANG Qing-shi, LAI Yun-zhong. Entropy evolution of field in system of cascade three-level atom interacting with binomial field in a Kerr-like medium[J]. Chinese Journal of Quantum Electronics, 2009, 26(2): 223.

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