Entanglement Degree During Generation of Quantum Controlled-NOT Gates
-
摘要: 用囚禁冷离子制备量子可控非门包括3次连续激光脉冲操作.分析了制备过程中的纠缠动力学和纠缠度随时间的变化规律.关于纠缠度的计算结果表明,在第1和第3步激光操作过程中离子内外态无纠缠,在第2步激光操作中离子内外态具有较强的纠缠,并呈现出一定的周期性.Abstract: Generation of quantum controlled-NOT gates consists of sequentially applying three laser pulses to trapped cold ions.The entanglement dynamics during the generation of quantum controlled-NOT gates and the variation in entanglement degrees with time were analyzed.The results show that there is not entanglement between external state and internal state of trapped cold ions in the first and third laser pulses,and there is strong periodic entanglement in the second laser pulse.
-
MONROE C,MEEKHOF D M,KING B E,et al.Demonstration of a fundamental quantum logic gate[J].Phys.Rev.Lett.,1995,75(25):4 714-4 717.[2] 吴昆,马雷.量子全加器构造的探讨[J].量子电子学报,2004,21(1):27-30.WU Kun,MA Lei.Study on construction of quantum full-summator[J].Chinese Journal of Quantum Electronics,2004,21(1):27-30.[3] 李晋芳,张志军,马雷.囚禁离子+腔场系统中量子逻辑门的实现[J].量子电子学报,2004,21(6):751-756.LI Jinfang,ZHANG Zhijun,MA Lei.Implementation of quantum logic gates via the interaction in trapped-ion cavity QED[J].Chinese Journal of Quantum Electronics,2004,21(6):751-756.[4] CIRAC J I,ZOLLER P.Quantum computations with cold trapped ions[J].Phys.Rev.Lett.,1995,74(20):4 091-4 094.[5] 陈明伦,王顺金.用激光-二能级原子系统实现一位通用量子逻辑门[J].物理学报,2006,55(9):4 638-4 641.CHEN Minglun,WANG Shunjin.Physical realization of single qubit gate using laser-two-level-atom system[J].Acts Physics Sinica,2006,55(9):4 638-4 641.[6] 蓝海江,杨庆怡,韦联福.单离子阱中基本量子逻辑单元的实现[J].物理学报,2002,51(8):1 730-1 735.LAN Haijiang,YANG Qingyi,WEI Lianfu.Elementary quantum gates with a single trapped ion driven by a classical laser field[J].Acts Physics Sinica,2002,51(8):1 730-1 735.[7] LEIBFRIED D,BLATT R,MONROE C,et al.Quantum dynamics of single trapped ions[J].Rev.Med.Phys.,2001,75(1):281-322.[8] 张茜,李福利,李宏荣.基于双模压缩信道的双模高斯态量子隐形传输[J].物理学报,2006,55(5):2 275-2 280.[1] MONROE C,MEEKHOF D M,KING B E,et al.Demonstration of a fundamental quantum logic gate[J].Phys.Rev.Lett.,1995,75(25):4 714-4 717.ZHANG Qian,LI Full,LI Hongrong.Telepertation of a two-mode Gaussian state through double two-mode-squeezod-state quantum channels[J].Acta Physica Siniea,2006,55(5):2 275-2 280.[9] 邹红梅,方卯发.两纠缠二能级原子在真空场中的纠缠动力学[J].量子电子学报,2007,24(4):480-484.zou Hongrnei,FANG Maofa.Entanglement dynamics of two entangled two-level atoms in vacuum field[J].Chinese Journal of Quantum Electronics,2007,24(4):480-484.[10] RAIMOND J M,BRUNE M,HAROCHE S.Manipulating quantum entanglement with atoms and photons in a cavity[J].Rev.MOd.Phys,2001,73(3):565-580[11] 王菊霞,杨志勇,安毓英.利用多光子相互作用实现量子信息传递[J].光学学报,2007,27(8):1 508-1 512.WANG Juxia,YANG Zhiyong,AN Yuying.Quantum information transfer via multi-photon interaction[J].Aeta Optiea Siniea,2007,27(8):1 508-1 512.[12] 汪贤才,王长春,方曙东.关于量子非局域逻辑门的研究[J].量子电子学报,2005,22(3):392-395.WANG Xianeai,WANG Changehun,FANG Shudong.On nouloeal quantum gates[J].Chinese Journal of Quantum Electronics,2005,22(3):392-395.[13] WEI L F,LIU S Y,LEI X L.Quantum computation with two-level trapped cold iota beyond Lamb-Dicke limit[J].Phys.Rev.A,2002,65(6):0623161-0623169.[14] WEI L F,LEI X L.Quantum controlled-NOT gates with a single trapped ion[J].J.Opt.B.,2000,2(7):581-583.[15] WEI L F,LIU S Y,LEI X L.Exact quantum logic gates with a single trapped cold ion[J].Chinese Physics Letters,2001,18(11):1 533-1 535.[16] ABOURADDY A F,SALEH B E A,SERGIENKO A V,et al.Degree of entanglement for two qubits[J].Phys.Rev.A,2001,64(5):050101-050104.[17] VOGEL W,DEMATOSFILHO R L.Nonlinear Jaynes-Cummings dynamics of a trapped ion[J].Phys.Rev.A,1995,52(5):4 214-4 217.[18] WEI L F,LIU Y X,NORI F.Engineering quantum pure states of a trapped cold ion beyond the Lamb-Dieke limit[J].Phys.Rev.A,2004,70(6):0638011-0638019.[19] ZUREK W H.Decoherence,einselection,and the quantum origins of the classical[J].Rev.Mod.Phys.,2003,75(3):715-775.[20] NAGERL H C,ROOS C,LEIBFRIED D,et al.Investigating a qubit candidate:spectroscopy on the S1/2 to D5/2 transition of a trapped Calcium ion in a linear Paul trap[J].Phys.Rev.A,2000,61(2):023405-023414.[21] STEVENS D,BROCHARD J,STEANE A M.Simple experimental methods for trapped-ion quantum processors[J].Phys.Rev.A,1998,58(4):2 750-2 759.
点击查看大图
计量
- 文章访问数: 1640
- HTML全文浏览量: 68
- PDF下载量: 480
- 被引次数: 0