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Bright solitons in ultracold atoms

机译:超冷原子中的明亮孤子

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We review old and recent experimental and theoretical results on bright solitons in Bose-Einstein condensates made of alkali-metal atoms and under external optical confinement. First we deduce the three-dimensional Gross-Pitaevskii equation (3D GPE) from the Dirac-Frenkel action of interacting identical bosons within a time-dependent Hartree approximation. Then we discuss the dimensional reduction of the GPE from 3D to 1D, deriving the 1D GPE and also the 1D nonpolynomial Schroedinger equation (1D NPSE). Finally, we analyze the bright solition solutions of both 1D GPE and 1D NPSE and compare these theoretical predictions with the available experimental data.
机译:我们回顾了由碱金属原子制成的玻色-爱因斯坦凝聚物中的亮孤子在外部光学约束下的最新实验和理论结果。首先,我们从与时间依赖的Hartree近似中相互作用相同玻色子的Dirac-Frenkel作用推导了三维Gross-Pitaevskii方程(3D GPE)。然后,我们讨论了GPE从3D降维到1D的维数,导出了1D GPE以及1D非多项式Schroedinger方程(1D NPSE)。最后,我们分析了1D GPE和1D NPSE的明亮孤立解决方案,并将这些理论预测与可用的实验数据进行了比较。

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