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arXiv 0907.1248cond-mat.quant-gas
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各向异性横向约束下物质波的广义非多项式薛定谔方程

Generalized nonpolynomial Schrodinger equations for matter waves under anisotropic transverse confinement

Luca Salasnich

摘要:

从三维Gross-Pitaevskii方程出发,导出了一维广义非多项式Schrodinger方程,它描述了玻色-爱因斯坦凝聚体在纵向一般势和横向径向各向异性调和势作用下的动力学行为.在各向同性横向谐波约束的情况下,该方程简化为熟悉的1D非多项式薛定谔方程[Phys.Rev.A65,043614(2002)]。此外,我们还证明了如果纵向势模型为周期性光晶格,则3D GPE可以映射为一维广义离散非多项式薛定谔方程。

英文摘要:

Starting from the three-dimensional Gross-Pitaevskii equation we derive a 1D generalized nonpolynomial Schrodinger equation, which describes the dynamics of Bose-Einstein condensates under the action of a generic potential in the longitudinal axial direction and of an anisotropic harmonic potential in the transverse radial direction. This equation reduces to the familiar 1D nonpolynomial Schrodinger equation [Phys. Rev. A 65, 043614 (2002)] in the case of isotropic transverse harmonic confinement. In addition, we show that if the longitudinal potential models a periodic optical lattice the 3D GPE can be mapped into a 1D generalized discrete nonpolynomial Schrodinger equation.

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