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arXiv 0807.3129cond-mat.other
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极性分子的玻色-爱因斯坦凝聚体:各向异性相互作用=各向异性质量

Bose-Einstein condensates of polar molecules: anisotropic interactions = anisotropic mass

Andrei Derevianko

摘要:

到目前为止,极性分子的玻色-爱因斯坦凝聚体(BEC)理论是基于球形原子方程的特别推广。在这里,我采用严格的赝势方法来处理低能偶极相互作用,并推导出一个非线性的平均场薛定谔方程的谐波捕获凝聚。我表明,有效地,偶极相互作用改变分子质量。由此产生的有效质量是各向异性的:对于首阶,质量只在沿着极化场的运动中改变。对于一个典型的自旋极化的磁相互作用的碱金属原子的BEC的有效原子质量减少了10%,从它的裸值。对于极性分子的BEC,质量可以减少1,000倍。

英文摘要:

So far the theory of Bose-Einstein condensates (BEC) of polar molecules was based on an ad hoc generalization of equations for spherical atoms. Here I adopt a rigorous pseudo-potential approach to low-energy dipolar interactions and derive a non-linear mean-field Schrodinger equation for a harmonically-trapped condensate. I show that, effectively, the dipolar interactions alter molecular mass. The resulting effective mass is anisotropic: to the leading order the mass is altered only for the motion along the polarizing field. For a typical BEC of spin-polarized magnetically-interacting alkali-metal atoms the effective atomic mass is reduced by 10% from its bare value. For a BEC of polar molecules the mass may be reduced by a factor of a 1,000.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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