利用负熵方法,研究了混合态下运动二能级原子与二项式光场相互作用多光子跃迁过程系统中的量子纠缠特性,讨论了原子初态、场模结构参数、光场最大光子数、二项式系数、跃迁光子数、失谐量等物理参量对系统纠缠度的影响.结果表明:考虑原子运动时,系统出现了规则的周期振荡,并且有退纠缠现象产生.随着场模结构参数的增大,振荡周期缩短,振幅减小.系统的纠缠值与原子初始混合程度有关,原子初态趋于纯态时系统纠缠度较高.随着二项式光场最大光子数的增大,系统纠缠度的峰值逐渐变小,系统规则振荡的周期不发生改变.二项式光场趋于中间态时纠缠值较小.随着跃迁光子数的增大,系统纠缠度的峰值逐渐变大,振荡周期缩短,并且振荡变得越来越快.考虑失谐时,系统出现了不规则的纠缠,系统纠缠度的最大值随着失谐量的增大而减小.
参考文献
| [1] | Cao Dong,et al.Computationally secure bit commitment protocol based on quantum steganography[J].Chinese Journal of Quantum Electronics(量子电子学报),2012,29(1):63-68 (in Chinese). |
| [2] | Lee Jinyoung,Kim M S.Entanglement teleportation via Werner states[J].Phys.Rev.Lett.,2000,84(18):4236-4239. |
| [3] | Zhang Qunyong.Quantum secret sharing of single-qubit state via tripartite entangled states[J].Chinese Journal of Quantum Electronics(量子电子学报),2012,29 (4):421-425 (in Chinese). |
| [4] | Plenio M B,Vedrak V.Entanglement measures and purification procedures[J].Phys.Rev.A,1998,57(3):1619-1633. |
| [5] | Phoenix S J D,Knight P L.Fluctuations and entropy in models of quantum optical resonance[J].Annals of Physics,1989,186:381-407. |
| [6] | Barnett S M,Phoenix S J D.Entropy as a measure of quantum optical correlation[J].Phys.Rev.A,1989,40(5):2404-2408. |
| [7] | Tan Lei,Zhang Yuqing,Zhu Zhonghua.Entanglement dynamics of a moving multi-photon Jaynes-Cummings model in mixed states[J].Chinese Physics B,2011,20(7):070303(7). |
| [8] | Muqier,Sachuerfu,Zhang Dongxia.Quantum properties of the entangled coherent light field in the multi-photon anti-Jaynes-Cummings model[J].Journal of Optoelectronics · Laser(光电子 ·激光),2011,22(5):788-792 (in Chinese). |
| [9] | Bao Li,Sachuerfu,Wu Shumei.Quantum entanglement of binomial field interacting with moving atoms in multiphoton Tavis-Cummings model[J].Chinese Journal of Quantum Electronics(量子电子学报),2010,27(5):580-585 (in Chinese). |
| [10] | Chen Aixi,Zhang Zengchang.Bionmial field interacting with atom inside a highr Q cavity filled with a Kerr medium[J].Acta Photonica(光子学报),2003,32(10):1275-1277 (in Chinese). |
| [11] | Hu Yaohua,Fang Maofa,Liao 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):4631-4636 (in Chinese). |
| [12] | Akhtarshenas S J,Farsi M.Negativity as entanglement degree of the Jaynes-Cumming model[J].Physica Scripta,2007,75(5):608-614. |
| [13] | Guo Guangcan.Quantum Optics(量子光学)[M].Beijing:Higher Education Press,1990:496-498 (in Chinese). |
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