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DENSITY-MATRIX RENORMALIZATION-GROUP CALCULATION OF CORRELATION-FUNCTIONS IN THE ONE-DIMENSIONAL HUBBARD-MODEL
QIN, SJ; LIANG, SD; SU, ZB; YU, L; QIN, SJ , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
1995
发表期刊PHYSICAL REVIEW B
ISSN0163-1829
卷号52期号:8页码:R5475-R5478
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.
部门归属PENN STATE UNIV,DEPT PHYS,UNIVERSITY PK,PA 16802; INT CTR THEORET PHYS,I-34100 TRIESTE,ITALY
关键词Momentum Distribution Correlation Exponents Heisenberg Chain Quantum Fluids Field Systems
学科领域Physics
收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/11714
专题理论物理所SCI论文
通讯作者QIN, SJ , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
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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.
APA QIN, SJ,LIANG, SD,SU, ZB,YU, L,&QIN, SJ , ACAD SINICA,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA..(1995).DENSITY-MATRIX RENORMALIZATION-GROUP CALCULATION OF CORRELATION-FUNCTIONS IN THE ONE-DIMENSIONAL HUBBARD-MODEL.PHYSICAL REVIEW B,52(8),R5475-R5478.
MLA QIN, SJ,et al."DENSITY-MATRIX RENORMALIZATION-GROUP CALCULATION OF CORRELATION-FUNCTIONS IN THE ONE-DIMENSIONAL HUBBARD-MODEL".PHYSICAL REVIEW B 52.8(1995):R5475-R5478.
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