论文标题
壳结构与偶极性费米气体中的陷阱变形之间的相互作用
Interplay between shell structure and trap deformation in dipolar fermi gases
论文作者
论文摘要
已知有限的费米亚系统在弱相互交互的方向上表现出壳结构，并在二维中众所周知，从原子，核，金属簇甚至量子点中得知。所有这些系统通常都认为电子或核子之间的粒子相互作用在空间上是各向同性的。然而，偶极量子系统已通过超冷气体实现，但是，两体相互作用的内在各向异性依赖于偶极子相对于彼此的方向。在这里，我们研究了这种相互作用各向异性如何修饰弱相互作用的二维各向异性谐波陷阱中的壳结构。通过应用所谓的“重要性截断”配置互动（CI）方法以及具有单一和双重取消构成的二次CI，超越了Hartree fock，我们展示了系统中的磁磁图如何通过恢复对称性的同位素损伤的变形来抵消系统中的磁置。
Finite fermion systems are known to exhibit shell structure in the weakly-interacting regime, as well known from atoms, nuclei, metallic clusters or even quantum dots in two dimensions. All these systems have in common that the particle interactions between electrons or nucleons are spatially isotropic. Dipolar quantum systems as they have been realized with ultra-cold gases, however, are governed by an intrinsic anisotropy of the two-body interaction that depends on the orientation of the dipoles relative to each other. Here we investigate how this interaction anisotropy modifies the shell structure in a weakly interacting two-dimensional anisotropic harmonic trap. Going beyond Hartree-Fock by applying the so-called "importance-truncated" configuration interaction (CI) method as well as quadratic CI with single- and double-substitutions, we show how the magnetostriction in the system may be counteracted upon by a deformation of the isotropic confinement, restoring the symmetry.
