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题名: DENSITY-MATRIX RENORMALIZATION-GROUP CALCULATION OF CORRELATION-FUNCTIONS IN THE ONE-DIMENSIONAL HUBBARD-MODEL
作者: QIN, SJ ;  LIANG, SD ;  SU, ZB ;  YU, L
刊名: PHYSICAL REVIEW B
出版日期: 1995
卷号: 52, 期号:8, 页码:R5475-R5478
关键词: MOMENTUM DISTRIBUTION ;  CORRELATION EXPONENTS ;  HEISENBERG CHAIN ;  QUANTUM FLUIDS ;  FIELD ;  SYSTEMS
学科分类: Physics
通讯作者: QIN, SJ , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
部门归属: PENN STATE UNIV,DEPT PHYS,UNIVERSITY PK,PA 16802; INT CTR THEORET PHYS,I-34100 TRIESTE,ITALY
英文摘要: We have studied correlation functions of the one-dimensional Hubbard model using the density-matrix numerical renormalization-group approach. The singularity exponents of the momentum distribution at k=k(F) and 3k(F), as well as the power-law singularity of the spin-correlation function, are computed for large U (U/t=10(3)). The momentum-distribution exponent at k=k(F) and the spin-correlation exponent are in agreement with the analytic results, while the calculated exponent for momentum distribution at k=3k(F) is about 3/4, which disagrees with the analytically predicted value 9/8. We also discuss several techniques for an accurate calculation of the correlation functions.
收录类别: SCI
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/11714
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
QIN, SJ,LIANG, SD,SU, ZB,et al. DENSITY-MATRIX RENORMALIZATION-GROUP CALCULATION OF CORRELATION-FUNCTIONS IN THE ONE-DIMENSIONAL HUBBARD-MODEL[J]. PHYSICAL REVIEW B,1995,52(8):R5475-R5478.
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文件名: DENSITY-MATRIX RENORMALIZATION-GROUP CALCULATION OF CORRELATION-FUNCTIONS IN THE ONE-DIMENSIONAL HUBBARD-MODEL.pdf
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