Numerical Study of Luttinger Liquid Regime of Two-Leg Hubbard Ladders
CHENG Kuan1 , LIU Yu-Liang2
1 Department of Physics, Tsinghua University, Beijing 100084
2 Center for Advanced Study, Tsinghua University, Beijing 100084
Numerical Study of Luttinger Liquid Regime of Two-Leg Hubbard Ladders
CHENG Kuan1 ;LIU Yu-Liang2
1 Department of Physics, Tsinghua University, Beijing 100084
2 Center for Advanced Study, Tsinghua University, Beijing 100084
关键词 ：
71.10.Fd ,
71.10.Pm ,
74.20.Mn
Abstract ： We investigate two-leg Hubbard ladders in the Luttinger liquid regime by the density-matrix renormalization group method. Applicability of the bond concept in this region is discussed in a quantitative comparison of power-law decay exponents, energy components and anti-bond occupations between ladders and chains. The interaction between bond and anti-bond bands induced by finite Hubbard repulsion U is emphasized by our numerical results. Our quantitative results are useful for the justification of the validity of various analytical approaches.
Key words ：
71.10.Fd
71.10.Pm
74.20.Mn
出版日期: 2005-09-01
:
71.10.Fd
(Lattice fermion models (Hubbard model, etc.))
71.10.Pm
(Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.))
74.20.Mn
(Nonconventional mechanisms)
引用本文:
CHENG Kuan;LIU Yu-Liang. Numerical Study of Luttinger Liquid Regime of Two-Leg Hubbard Ladders[J]. 中国物理快报, 2005, 22(9): 2349-2352.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2005/V22/I9/2349
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