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运用分步傅里叶方法数值求解耦合Gross-Pitaevskii方程,研究了具有局部畸变的光格势阱中两个线性耦合的玻色-爱因斯坦凝聚孤子的动力学特性.结果表明,势阱的局部畸变强度和线性耦合系数的大小对两个耦合物质波孤子的交换和自陷效应有重要影响,线性耦合系数的增加,物质波孤子间的相互作用从自陷过渡到Josephson振荡.当势阱的局部畸变强度为一些特殊值时,势阱的局部畸变对物质波孤子的演化影响甚微.

参考文献

[1] Kasamatsu K,Tsubota M.Modulation instability and solitary-wave formation in two-component Bose-Einstein condensates[J].Phys.Rev.A,2006,74:013617,1-14.
[2] Hooley S,Benedict K A.Dynamical instabilities in a two-component Bose-Einstein condensate in a onedimensional optical lattice[J].Phys.Rev.A,2007,75:033621,1-8.
[3] Barontini G,Mofugno M.Instabilities of a matter wave in a matter grating[J].Phys.Rev.A,2009,80:063613,1-6.
[4] Li Hong,Wang Dongning,Cheng Yongshan.Dynamics of dark-bright vector solitons in a two-component BoseEinstein condensate[J].Chaos,Solitons and Fractals,2009,39:1988-1993.
[5] Cheng Yongshan,Li Hong,Gong Rongzhou.Effects of parameters on the stationary state and self-trapping of three coupled Bose-Einstein condensate solitons[J].Chin.Opt.Lett.,2005,3(12):715-718.
[6] Cheng Yongshan,Li Hong,Gong Rongzhou.Effects of cigar-shaped traps on switching and self-trapping of two Bose-Einstein condensate solitons[J].Chinese Journal of Quantum Electronics (量子电子学报),2005,22(8):879-883 (in Chinese).
[7] Albiez M,Gati R,F(o)lling J,et al.Direct observation of tunneling and nonlinear self-trapping in a single bosonic Josephson junction[J].Phys.Rev.Lett.,2005,95:010402,1-4.
[8] Kierig E,Schnorrberger U,et al.Single-particle tunneling in strongly driven double-well potentials[J].Phys.Rev.Lett.,2008,100:190405,1-4.
[9] Shchesnovich V S,Cavalcanti S B,et al.Solitons in tunnel-coupled repulsive and attractive condensates[J].Phys.Rev.A,2004,69:033609,1-10.
[10] Cheng Yongshan,Li Hong,Yin Dejing.Effects of localized impurity of trap on characteristics of two Bose-Einstein condensates[J].Chin.Opt.Lett.,2005,3(5):305-307.
[11] Frantzeskakis D J,Theocharis G,Diakonos F K,et al.Interaction of dark solitons with localized impurities in Boee-Einstein condensates[J].Phys.Rev.A,2002,66:053608,1-9.
[12] Raghavan S,Smerzi A,Fantoni S,et al.Coherent oscillations between two weakly coupled Bose-Einstein condensates:Josephson effects,π oscillations,and macroscopic quantum self-trapping[J].Phys.Rev.A,1999,59:620-633.
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