Cluster formation in two-component Fermi gases
Abstract
Two-component fermions are known to behave like a gas of molecules in the limit of Bose-Einstein condensation of diatomic pairs tightly bound with zero-range interactions. We discover that the formation of cluster states occurs when the effective range of two-body interaction exceeds roughly times the scattering length, regardless of the details of the short-range interaction. Using explicitly correlated Gaussian basis set expansion approach, we calculate the binding energy of cluster states in trapped few-body systems and show the difference of structural properties between cluster states and gas-like states. We identify the condition for cluster formation and discuss potential observation of cluster states in experiments.
Keywords
Cite
@article{arxiv.1902.07858,
title = {Cluster formation in two-component Fermi gases},
author = {X. Y. Yin and Hui Hu and Xia-Ji Liu},
journal= {arXiv preprint arXiv:1902.07858},
year = {2019}
}
Comments
5+3 pages, 4+4 figures, accepted for publication in PRL