DENSITY-MATRIX RENORMALIZATION-GROUP CALCULATION OF CORRELATION-FUNCTIONS IN THE ONE-DIMENSIONAL HUBBARD-MODEL

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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
ISSN	0163-1829
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.
推荐引用方式 GB/T 7714	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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