运用全量子理论和数值计算的方法,借助于Negativity研究了Bell态原子与双模奇偶纠缠相干光场相互作用系统中两个全同二能级原子之间的纠缠演化特性.分析了光场强度、光场纠缠度及原子间相互作用强度对纠缠的影响.结果表明:原子初态处于|β11〉时,两原子始终处于最大纠缠态;原子初态处于|β00〉时,两原子始终较长时间处于退纠缠状态;原子处在|β10〉时,增大双模光场的平均光子数可以明显增大两原子之间的纠缠度并保持较大的纠缠状态;原子初态处在|β01〉时,原子间的相互作用强度对双原子间纠缠度有较显著的非线性调制作用.
参考文献
| [1] | Bennet C H,Brassard G.Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels[J].Phy.Rev.Lett.,1993,70(13):1895-1899. |
| [2] | Zhang Quan,Zhang Eryang,Tang Chaojing.Quantum error avoiding code based on the decoherence-free subspace[J].Acta Physica Sinica (物理学报),2002,51(8):1675-1683 (in Chinese). |
| [3] | Liu Tangkun.Squeezing properties in a system of entangled atoms interacting with optical field of SchrSdinger cat state[J].Chinese Journal of Quantum Electronics (量子电子学报),2006,23(5):641-646 (in Chinese). |
| [4] | Gao Yunfeng,Feng Jian,Zhang Guiming.Entanglement of two-mode squeezing vacuum state field interacting with atom via intensity-dependent coupling[J].J.At.Mol.Phys.,2006,23(5):887-891. |
| [5] | Tesser T E,Deutsch I H,Delgada A.Entanglement sharing in the two-atom Tavis-Cummings model[J].Phy.Rev.A,2003,68:062316. |
| [6] | Wang Juxia,Yang Zhiyong,An Yuying.Transfer of entangled state in the system evolution of coherent coupled-atom and coherent single-mode cavity-field[J].Chinese Journal of Quantum Electronics (量子电子学报),2008,25(1):71-75 (in Chinese). |
| [7] | 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):1989-1995 (in Chinese). |
| [8] | Zhang Yingjie,Zhou Yuan,Xia Yunjie.The entanglement character of two entangled atoms in multiphoton Tavis-Cummings model[J].Aeta Physica Sinica (物理学报),2008,57(1):21-27 (in Chinese). |
| [9] | Li Yongping,Wang Chuankui,He Jinyu.Entropy evolution properties of field in the system of two-mode squeezing vacuum field interacting with two coupling atoms[J].Chinese Journal of Quantum Electronics (量子电子学报),2005,22(4):617-621 (in Chinese). |
| [10] | Zou Hongmei,Fang Maofa.Entanglement dynamics of two entangled two-level atoms in the vacuum field[J].Chinese Journal of Quantum Electronics (量子电子学报),2007,24(4):480-484 (in Chinese). |
| [11] | Rai S,Luthra J R.Negativity and concurrence for two qutrits[OL].2005,quant-ph/0507263vl. |
| [12] | Akhtarshenas S J,Farsi M.Negativity as entanglement degree of the Jaynes-Cummings model[OL].2007,quant-ph/0702101vl. |
| [13] | Lin Jicheng,Zheng Xiaohu,Cao Zhuoliang.Dipole squeezing in the system of the two-mode entangled coherent field interacting with atoms in Bell states[J].Chinese Journal of Quantum Electronics (量子电子学报),2006,23(6):836-842 (in Chinese). |
| [14] | Guo Guangcan.Qutantum Optics[M].Beijing:Higher Education Press,1990.281-282 (in Chinese). |
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