Long-range states and Feshbach resonances in collisions between ultracold alkali-metal diatomic molecules and atoms
Long-range states and Feshbach resonances in collisions between ultracold alkali-metal diatomic molecules and atoms
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DOI：
10.1103/physrevresearch.5.023001
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发表时间：
2022-12
影响因子：
4.2
通讯作者：
Matthew D. Frye;J. Hutson
中科院分区：
文献类型：
--
作者：
Matthew D. Frye;J. Hutson
我们认为，从碱金属双原子分子在单重态和碱金属原子形成的复合物预期的长程状态。我们探讨了这种系统的哈密顿量的结构，以及存在的六个角动量之间的耦合。我们考虑了长程态的模式和密度，以及作为磁场的函数的哈密顿量中的项，可以导致Feshbach共振时，状态跨越阈值。我们提出了一个案例研究$^{40}$K$^{87}$Rb+$^{87}$Rb。我们显示了多种类型的共振，由于远程状态与旋转和/或超精细激发，并考虑它们存在于低至中等磁场的可能性。
We consider the long-range states expected for complexes formed from an alkali-metal diatomic molecule in a singlet state and an alkali-metal atom. We explore the structure of the Hamiltonian for such systems, and the couplings between the six angular momenta that are present. We consider the patterns and densities of the long-range states, and the terms in the Hamiltonian that can cause Feshbach resonances when the states cross threshold as a function of magnetic field. We present a case study of $^{40}$K$^{87}$Rb+$^{87}$Rb. We show multiple types of resonance due to long-range states with rotational and/or hyperfine excitation, and consider the likelihood of them existing at low to moderate magnetic fields.