Asymptotic correlation functions and FFLO signature for the one-dimensional attractive Hubbard model
Asymptotic correlation functions and FFLO signature for the one-dimensional attractive Hubbard model
复制标题
一维吸引力 Hubbard 模型的渐近相关函数和 FFLO 签名
DOI:
10.1016/j.nuclphysb.2018.02.016
复制
发表时间:
2017-10
影响因子:
2.8
通讯作者:
Guan Xi-Wen
中科院分区:
文献类型:
--
作者:
Cheng Song;Jiang Yuzhu;Yu Yi-Cong;Batchelor Murray T.;Guan Xi-Wen
We study the long-distance asymptotic behavior of various correlation functions for the one-dimensional (1D) attractive Hubbard model in a partially polarized phase through the Bethe ansatz and conformal field theory approaches. We particularly find the oscillating behavior of these correlation functions with spatial power-law decay, of which the pair (spin) correlation function oscillates with a frequency Δ k F (2 Δ k F). Here Δ k F= π (n↑− n↓) is the mismatch in the Fermi surfaces of spin-up and spin-down particles. Consequently, the pair correlation function in momentum space has peaks at the mismatch k= Δ k F, which has been observed in recent numerical work on this model. These singular peaks in momentum space together with the spatial oscillation suggest an analog of the Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state in the 1D Hubbard model. The parameter β representing the lattice effect becomes prominent in critical exponents which determine the power-law decay of all correlation functions. We point out that the backscattering of unpaired fermions and bound pairs within their own Fermi points gives a microscopic origin of the FFLO pairing in 1D.
登录
查看更多内容
DOI:
10.1103/physrevb.38.11566
发表时间:
1988-12
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Lee;Schlottmann
通讯作者:
Lee;Schlottmann
DOI:
10.1088/0305-4470/33/30/309
发表时间:
1999-08
期刊:
Journal of Physics A
影响因子:
--
作者:
X. Guan
通讯作者:
X. Guan
影响因子:
1.9
作者:
N. Bogoliubov;V. Korepin
通讯作者:
N. Bogoliubov;V. Korepin
DOI:
10.1016/s0550-3213(96)00630-x
发表时间:
1997-02
期刊:
Nuclear Physics
影响因子:
--
作者:
X. Guan;Mei-Shan Wang;Shan-de Yang
通讯作者:
X. Guan;Mei-Shan Wang;Shan-de Yang
影响因子:
1.7
作者:
M. Shiroishi;M. Wadati
通讯作者:
M. Shiroishi;M. Wadati