典型文献
Non-universal Fermi polaron in quasi two-dimensional quantum gases
文献摘要：
We consider an impurity problem in a quasi-two-dimensional Fermi gas,where a spin-down impurity is immersed in a Fermi sea of N spin-up atoms.Using a variational approach and an effective two-channel model,we obtain the energy for a wide range of interaction strength and for various different mass ratios between the impurity and the background fermion in the context of heteronuclear mixture.We demonstrate that in a quasi-two-dimensional Fermi gas there exists a transition of the ground state from polaron in the weakly interacting region to molecule in the strongly interacting region.The critical interaction strength of the polaron-molecule transition is non-universal and depends on the particle density of the background Fermi sea.We also investigate the excited repulsive polaron state,and find similar non-universal behavior.
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作者姓名：
Yue-Ran Shi;Jin-Ge Chen;Kui-Yi Gao;Wei Zhang
作者机构：
Department of Physics,Renmin University of China,Beijing 100872,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China;Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices,Renmin University of China,Beijing 100872,China
文献出处：
引用格式：
[1]Yue-Ran Shi;Jin-Ge Chen;Kui-Yi Gao;Wei Zhang-.Non-universal Fermi polaron in quasi two-dimensional quantum gases)[J].中国物理B（英文版）,2022(08):274-279
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0.535391
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