物理学报2019，Vol.68Issue(4)：44-57,14.DOI:10.7498/aps.68.20181937
轨道Feshbach共振附近类碱土金属原子的杂质态问题
Impurity problem of alkaline-earth-like atoms near an orbital Feshbach resonance
摘要
Abstract
In recent years, alkaline-earth and alkaline-earth-like atoms have attracted much research interest in the field of ultracold atom. Especially, the recently discovered orbital Feshbach resonance makes it possible to investigate a strongly interacting gas of alkaline-earth or alkaline-earth-like atoms, which has greatly enriched the scope of quantum simulation in these systems. This paper focuses on the impurity problem in a Fermi gas of 173Yb atoms near orbital Feshbach resonance. In this problem, the impurity atom in 3P0 state will interact with the background Fermi sea in the ground state and the molecule or polaron state will be produced out of the Fermi sea. By using the Chevy-like ansatz, we investigate the properties of the molecule and attractive polaron states firstly and a transition between these two states will be found. Then, some properties of the repulsive polaron state will be introduced, such as the effective mass and the decay rate. Furthermore, the effect of an additional Fermi sea will be considered in this system. Finally, we will discuss the impurity problem in a twodimensional system.关键词
类碱土金属原子/轨道Feshbach共振/分子态/极化子态Key words
alkaline-earth-like atom/orbital Feshbach resonance/the molecule state/the polaron state引用本文复制引用
石悦然,卢倬成,王璟琨,张威..轨道Feshbach共振附近类碱土金属原子的杂质态问题[J].物理学报,2019,68(4):44-57,14.基金项目
国家重点研发计划(批准号: 2018YFA0306501)、国家自然科学基金(批准号: 11434011, 11522436, 11774425) 和中国人民大学科研基金(批准号: 16XNLQ03, 18XNLQ15) 资助的课题. （批准号: 2018YFA0306501）
