Block entanglement in the single-hole Hubbard model

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	Block entanglement in the single-hole Hubbard model
	K. L. Yao; X. Z. Sun; Z. L. Liu; Y. C. Li; L. Yu; G. Y. Gao
	2006
发表期刊	Chinese Physics Letters
ISSN	0256-307X
卷号	23 期号:9 页码:2352-2355
摘要	We investigate the distribution of the entanglement of the one-dimensional single-hole Hubbard model (HM) and study the relationship between the entanglement and the quantum phase transition in the model. The von Neumann entropy of a block with neighbouring spins L for a single-hole HM is calculated using the density-matrix renormalization group. The distribution of the entanglement entropy in the ground state, as a function of block length, show a dramatic effect, i.e. effectively decoupling with centres, no matter how the Coulomb interaction u > 0 or u < 0. Contarily, for the Coulomb interaction u = 0 or close to zero, the entanglement entropy in the single-hole model reaches a saturation model for a certain block size. For a fixed size L = 40, the ground state entanglement entropy measure, as a function of u, shows a peak corresponding to the critical quantum phase transition.
部门归属	huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;yao, kl (reprint author), huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china;kylao@hust.edu.cn
关键词	Quantum Renormalization-groups Phase-transition Entropy
URL	查看原文
WOS记录号	WOS:000240250300002
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34657
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. L. Yao,X. Z. Sun,Z. L. Liu,et al. Block entanglement in the single-hole Hubbard model[J]. Chinese Physics Letters,2006,23(9):2352-2355.
APA	K. L. Yao,X. Z. Sun,Z. L. Liu,Y. C. Li,L. Yu,&G. Y. Gao.(2006).Block entanglement in the single-hole Hubbard model.Chinese Physics Letters,23(9),2352-2355.
MLA	K. L. Yao,et al."Block entanglement in the single-hole Hubbard model".Chinese Physics Letters 23.9(2006):2352-2355.