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题名: Fermi polaron in a one-dimensional quasiperiodic optical lattice: The simplest many-body localization challenge
作者: Hu, H ;  Wang, AB ;  Yi, S ;  Liu, XJ
刊名: PHYSICAL REVIEW A
出版日期: 2016
卷号: 93, 期号:5, 页码:53601
学科分类: Optics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevA.93.053601
通讯作者: Hu, H (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China. ;  Hu, H (reprint author), Swinburne Univ Technol, Ctr Quantum & Opt Sci, Melbourne, Vic 3122, Australia.
文章类型: Article
英文摘要: We theoretically investigate the behavior of a moving impurity immersed in a sea of fermionic atoms that are confined in a quasiperiodic (bichromatic) optical lattice within a standard variational approach. We consider both repulsive and attractive contact interactions for such a simple many-body localization problem of Fermi polarons. The variational approach enables us to access relatively large systems and therefore may be used to understand many-body localization in the thermodynamic limit. The energy and wave function of the polaron states are found to be strongly affected by the quasirandom lattice potential and their experimental measurements (i.e., via radio-frequency spectroscopy or quantum gas microscope) therefore provide a sensitive way to underpin the localization transition. We determine a phase diagram by calculating two critical quasirandom disorder strengths, which correspond to the onset of the localization of the ground-state polaron state and the many-body localization of all polaron states, respectively. Our predicted phase diagram could be straightforwardly examined in current cold-atom experiments.
类目[WOS]: Optics ;  Physics, Atomic, Molecular & Chemical
关键词[WOS]: METAL-INSULATOR-TRANSITION ;  INTERACTING FERMIONS
收录类别: SCI
项目资助者: ARC [FT130100815, DP140103231, FT140100003, DP140100637] ;  National 973 program of China [2011CB921502, 2012CB922104] ;  NSFC [11434011, 11421063]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21666
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Hu, H,Wang, AB,Yi, S,et al. Fermi polaron in a one-dimensional quasiperiodic optical lattice: The simplest many-body localization challenge[J]. PHYSICAL REVIEW A,2016,93(5):53601.
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