Studies on entanglement entropy for Hubbard model with hole-doping and external magnetic field

IMR OpenIR

	Studies on entanglement entropy for Hubbard model with hole-doping and external magnetic field
	K. L. Yao; Y. C. Li; X. Z. Sun; Q. M. Liu; Y. Qin; H. H. Fu; G. Y. Gao
	2005
发表期刊	Physics Letters A
ISSN	0375-9601
卷号	346 期号:1-3 页码:209-216
摘要	By using the density matrix renormalization group (DMRG) method for the one-dimensional (1D) Hubbard model, we have studied the von Neumann entropy of a quantum system, which describes the entanglement of the system block and the rest of the chain. It is found that there is a close relation between the entanglement entropy and properties of the system. The hole-doping can alter the charge-charge and spin-spin interactions, resulting in charge polarization along the chain. By comparing the results before and after the doping, we find that doping favors increase of the von Neumann entropy and thus also favors the exchange of information along the chain. Furthermore, we calculated the spin and entropy distribution in external magnetic filed. It is confirmed that both the charge-charge and the spin-spin interactions affect the exchange of information along the chain, making the entanglement entropy redistribute. (c) 2005 Elsevier B.V. All rights reserved.
部门归属	huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china. huazhong univ sci & technol, state key lab laser technol, 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;hustliyan@163.com
关键词	Matrix Renormalization-group
URL	查看原文
WOS记录号	WOS:000232168900031
引用统计	被引频次：4[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/321006/35178
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. L. Yao,Y. C. Li,X. Z. Sun,et al. Studies on entanglement entropy for Hubbard model with hole-doping and external magnetic field[J]. Physics Letters A,2005,346(1-3):209-216.
APA	K. L. Yao.,Y. C. Li.,X. Z. Sun.,Q. M. Liu.,Y. Qin.,...&G. Y. Gao.(2005).Studies on entanglement entropy for Hubbard model with hole-doping and external magnetic field.Physics Letters A,346(1-3),209-216.
MLA	K. L. Yao,et al."Studies on entanglement entropy for Hubbard model with hole-doping and external magnetic field".Physics Letters A 346.1-3(2005):209-216.