AI 中文总结
该研究探究屏蔽超冷分子的 onsite 相互作用能，发现其随晶格强度变化的行为与超冷原子不同，可为多格点占据的强偶极哈伯德物理提供新途径。
AI 中文摘要
我们研究同一格点上成对的屏蔽超冷分子的 onsite 相互作用能 $U$，采用适用于微波屏蔽的二维有效势，该势在长程具有偶极-偶极特性，两分子靠近时存在极大排斥芯，导致同一格点上两分子运动间产生极强关联。我们发现其行为与超冷原子截然不同：特定状态下，弱晶格中 $U$ 为负，随晶格强度增加会穿过零变为正值，该行为对未束缚对和两体束缚态均存在。后者将为多格点占据下此前未探索的强偶极哈伯德物理类型提供可能。
英文摘要
We explore on-site interaction energies $U$ for pairs of shielded ultracold molecules on the same lattice site. We use 2-dimensional effective potentials appropriate for microwave shielding, which have dipole-dipole character at long range but feature a very large repulsive core when the two molecules come close together. This causes very strong correlation between the motions of two molecules on the same site. We find behavior very different from that for ultracold atoms: in particular, there are states for which $U$ is negative for weak lattices but crosses zero to positive values as the lattice strength increases. This behavior is found for both unbound pairs and 2-body bound states. The latter will give access to previously unexplored types of strongly dipolar Hubbard physics with multiple site occupancy.
