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arXiv 1801.09375cond-mat.quant-gas
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具有多背景费米面的类碱土原子中的极化子

Polarons in Alkaline-earth-like Atoms with Multi Background Fermi Surfaces

Jin-Ge Chen, Yue-Ran Shi, Xiang Zhang, Wei Zhang

摘要:

研究了$^{173}$ Yb原子费米气体中在轨道费什巴赫共振附近的杂质问题,其中一个处于$^3P_0$态的运动粒子与$^1S_0$流形上两个处于不同核态的背景费米粒子相互作用.利用分子态和极化子态的波函数解,我们研究了分子、吸引极化子和排斥极化子态的各种性质。我们发现,在比较的情况下,只有一个费米海的人口,存在一个额外的费米海作为一个能量转移之间的两个通道的轨道费什巴赫共振。此外,费米能级附近的涨落也会对极化子的吸引态和排斥态带来很大的影响。

英文摘要:

We study the impurity problem in a Fermi gas of $^{173}$Yb atoms near an orbital Feshbach resonance, where a single moving particle in the $^3P_0$ state interacting with two background Fermi seas of particles in different nuclear states of the ground $^1S_0$ manifold. By employing wave function ansatzs for molecule and polaron states, we investigate various properties of the molecule, the attractive polaron, and the repulsive polaron states. We find that in comparison to the case of only one Fermi sea is populated, the presence of an additional Fermi sea acts as an energy shift between the two channels of the orbital Feshbach resonance. Besides, the fluctuation around the Fermi level would also bring sizable effects to the attractive and repulsive polaron states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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