强相互作用极性分子的有效多体理论
An effective many-body theory for strongly interacting polar molecules
摘要：
我们推导了玻色极性分子在强相互作用区域的一般有效多体理论，这是以前的理论在第一玻恩近似下不能正确描述的。有效哈密顿量具有额外的相互作用项，这令人惊讶地减少了形状共振区附近偶极相互作用的各向异性特征。在偶极矩垂直于平面的二维系统中，我们发现声子色散在低动量（$\bfp$）极限下的标度为$\sqrt{|\bfp|}$，表现出与具有库仑（$1/r$）相互作用的二维带电玻色气体相同的低能性质.
英文摘要：
We derive a general effective many-body theory for bosonic polar molecules in strong interaction regime, which cannot be correctly described by previous theories within the first Born approximation. The effective Hamiltonian has additional interaction terms, which surprisingly reduces the anisotropic features of dipolar interaction near the shape resonance regime. In the 2D system with dipole moment perpendicular to the plane, we find that the phonon dispersion scales as $\sqrt{|\bfp|}$ in the low momentum ($\bfp$) limit, showing the same low energy properties as a 2D charged Bose gas with Coulomb ($1/r$) interactions.
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