Near-threshold bound states of the dipole-dipole interaction
Near-threshold bound states of the dipole-dipole interaction
复制标题
偶极-偶极相互作用的近阈值束缚态
作者：
T. Karman;Matthew D. Frye;J. Reddel;J. Hutson
我们研究了描述两个场取向的偶极矩之间相互作用的模型哈密顿量的两体束缚态。这个模型在超冷极性分子和磁性原子的多体物理中得到了广泛的应用，但它在少体物理中的应用还不够充分。在硬壁短程边界条件下，偶极-偶极束缚态是普遍存在的，并且表现出不同性质的态之间避免交叉的复杂模式。对于更现实的Lennard-Jones短程相互作用，我们考虑代表磁性原子和极性分子的参数。对于磁性原子，束缚态由Lennard-Jones势控制，微扰偶极-偶极相互作用被货车德瓦尔斯束缚态的特殊结构所抑制。对于极性分子，我们发现了一个稠密的流形的偶极-偶极束缚态与许多避免交叉作为诱导偶极或施加场的函数，类似于那些硬壁边界条件。对于成对的超冷极性分子，这种普遍的状态模式可以用光谱观察到。
We study the two-body bound states of a model Hamiltonian that describes the interaction between two field-oriented dipole moments. This model has been used extensively in the many-body physics of ultracold polar molecules and magnetic atoms, but its few-body physics has been explored less fully. With a hard-wall short-range boundary condition, the dipole-dipole bound states are universal and exhibit a complicated pattern of avoided crossings between states of different character. For more realistic Lennard–Jones short-range interactions, we consider parameters representative of magnetic atoms and polar molecules. For magnetic atoms, the bound states are dominated by the Lennard–Jones potential, and the perturbative dipole-dipole interaction is suppressed by the special structure of van der Waals bound states. For polar molecules, we find a dense manifold of dipole-dipole bound states with many avoided crossings as a function of induced dipole or applied field, similar to those for hard-wall boundary conditions. This universal pattern of states may be observable spectroscopically for pairs of ultracold polar molecules.
影响因子：
19.6
作者：
S. Truppe;H. Williams;M. Hambach;L. Caldwell;N. Fitch;E. Hinds;B. Sauer;M. Tarbutt
通讯作者：
S. Truppe;H. Williams;M. Hambach;L. Caldwell;N. Fitch;E. Hinds;B. Sauer;M. Tarbutt
影响因子：
12.5
作者：
Maier, T.;Kadau, H.;Kotochigova, S.
通讯作者：
Kotochigova, S.