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Repulsive Polarons in One-Dimensional Fermi Gases

文献类型：期刊论文

作者Barthwal, Sachin1,3; Song, Ya-Dong2,3
刊名COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期2019-05-01
卷号71期号:5页码:617-622
关键词polaron variational method Tan contact cold atom
ISSN号0253-6102
DOI10.1088/0253-6102/71/5/617
英文摘要Using the variational method, we study the properties of a spin-down impurity immersed in a one-dimensional (1D) spin-up Fermi sea. With repulsive interactions between them, the impurity is dressed up by surrounding particles in Fermi sea and forms a polaron. We clearly calculate the binding energy, effective mass, momentum distribution, Tan contact, and pair correlation. Even in strong repulsive regimes, the results can agree with the exact Bethe Ansatz results. The repulsive polaron energy E+ is below Fermi energy E-F and no negative effective masses are found in whole interaction regimes, unequal masses polarons are also calculated. We show a clear momentum distribution and calculate the Tan contact from three different aspects. Furthermore, we explore the particle-hole excitation and find that the hole terms in Fermi sea have a great influence on the polaron energy and contact in repulsive regime. These results show that the variational method can still be used effectively in 1D repulsive polaron system.
WOS关键词INTERACTING FERMIONS
资助项目National Natural Science Foundation of China[11374331] ; National Natural Science Foundation of China[11304364] ; National Natural Science Foundation of China[11534014]
WOS研究方向Physics
语种英语
WOS记录号WOS:000468322000016
出版者IOP PUBLISHING LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.wipm.ac.cn/handle/112942/13667]  
专题中国科学院武汉物理与数学研究所
通讯作者Song, Ya-Dong
作者单位1.Chinese Acad Sci, Ctr Cold Atom Phys, Wuhan 430071, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Barthwal, Sachin,Song, Ya-Dong. Repulsive Polarons in One-Dimensional Fermi Gases[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2019,71(5):617-622.
APA Barthwal, Sachin,&Song, Ya-Dong.(2019).Repulsive Polarons in One-Dimensional Fermi Gases.COMMUNICATIONS IN THEORETICAL PHYSICS,71(5),617-622.
MLA Barthwal, Sachin,et al."Repulsive Polarons in One-Dimensional Fermi Gases".COMMUNICATIONS IN THEORETICAL PHYSICS 71.5(2019):617-622.

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来源：武汉物理与数学研究所

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