Polarons in alkaline-earth-like atoms with multiple background Fermi surfaces  

作　　者：Jin-Ge Chen Yue-Ran Shi Xiang Zhang Wei Zhang 

机构地区：[1]Department of Physics, Renmin University of China, Beijing 100872, China [2]Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, Beijing 100872, China

出　　处：《Frontiers of physics》2018年第4期185-193,共9页物理学前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （Grant Nos. 11434011, 11522436, 11704408, and 11774425）, and the Research Funds of Renmin University of China （Grant No. 16XNLQ03）. X. Z. ac- knowledges support from the National Postdoctoral Program for Innovative Talents （Grant No. BX201601908） and the China Post- doctoral Science Foundation （Grant No. 2017M620991）.

摘　　要：We study the impurity problem in a Fermi gas of 173Yb atoms near an orbital Feshbach resonance （OFR）, where a single moving particle in the 3p0 state interacts with two background Fermi seas of particles in different nuclear states of the ground 1S0 manifold. By employing wave function ansatz to molecule and polaron states, we investigate various properties of the molecule, the attractive polaron, and the repulsive polaron states. In comparison to the case where only one Fermi sea is populated, we find that the presence of an additional Fermi sea acts as an energy shift between the two channels of the OFR. In addition, quantum fluctuations near the Fermi level can also induce sizable effects to various properties of the attractive and repulsive polarons.We study the impurity problem in a Fermi gas of 173Yb atoms near an orbital Feshbach resonance （OFR）, where a single moving particle in the 3p0 state interacts with two background Fermi seas of particles in different nuclear states of the ground 1S0 manifold. By employing wave function ansatz to molecule and polaron states, we investigate various properties of the molecule, the attractive polaron, and the repulsive polaron states. In comparison to the case where only one Fermi sea is populated, we find that the presence of an additional Fermi sea acts as an energy shift between the two channels of the OFR. In addition, quantum fluctuations near the Fermi level can also induce sizable effects to various properties of the attractive and repulsive polarons.

关 键 词：Fermi gas alkaline-earth atoms orbital Feshbach resonance POLARON 

分 类 号：O562.3[理学—原子与分子物理] O471.3[理学—物理]