典型文献
Excitation spectra of one-dimensional spin-1/2 Fermi gas with an attraction
文献摘要：
Using an exact Bethe ansatz solution,we rigorously study excitation spectra of the spin-1/2 Fermi gas(called Yang-Gaudin model)with an attractive interaction.Elementary excitations of this model involve particle-hole excitation,hole excitation and adding particles in the Fermi seas of pairs and unpaired fermions.The gapped magnon excitations in the spin sector show a ferromagnetic coupling to the Fermi sea of the single fermions.By numerically and analytically solving the Bethe ansatz equations and the thermodynamic Bethe ansatz equations of this model,we obtain excitation energies for various polarizations in the phase of the Fulde-Ferrell-Larkin-Ovchinnikov-like state.For a small momentum(long-wavelength limit)and in the strong interaction regime,we analytically obtained their linear dispersions with curvature corrections,effective masses as well as velocities in particle-hole excitations of pairs and unpaired fermions.Such a type of particle-hole excitations display a novel separation of collective motions of bosonic modes within paired and unpaired fermions.Finally,we also discuss magnon excitations in the spin sector and the application of Bragg spectroscopy for testing such separated charge excitation modes of pairs and single fermions.
文献关键词：
中图分类号：
作者姓名：
Jia-Feng Pan;Jia-Jia Luo;Xi-Wen Guan
作者机构：
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;Department of Fundamental and Theoretical Physics,Research School of Physics,Australian National University,Canberra ACT 0200,Australia;University of Chinese Academy of Sciences,Beijing 100049,China;NSFC-SPTP Peng Huanwu Center for Fundamental Theory,Xi'an 710127,China
文献出处：
引用格式：
[1]Jia-Feng Pan;Jia-Jia Luo;Xi-Wen Guan-.Excitation spectra of one-dimensional spin-1/2 Fermi gas with an attraction)[J].理论物理,2022(12):154-175
A类：
Gaudin
B类：
Excitation,spectra,one,dimensional,spin,Fermi,gas,attraction,Using,exact,Bethe,ansatz,solution,rigorously,study,called,Yang,model,attractive,interaction,Elementary,excitations,this,involve,hole,adding,particles,seas,pairs,unpaired,fermions,gapped,magnon,sector,show,ferromagnetic,coupling,single,By,numerically,analytically,solving,equations,thermodynamic,energies,various,polarizations,phase,Fulde,Ferrell,Larkin,Ovchinnikov,like,state,For,small,momentum,long,wavelength,limit,strong,regime,obtained,their,linear,dispersions,curvature,corrections,effective,masses,well,velocities,Such,type,display,novel,separation,collective,motions,bosonic,modes,within,Finally,also,discuss,application,Bragg,spectroscopy,testing,such,separated,charge
AB值：
0.544904
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
