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

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	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
刊名	Physics Letters A
	2005
卷号	346 期号:1-3 页码:209-216
关键词	matrix renormalization-group
ISSN号	0375-9601
中文摘要	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.
原文出处	://WOS:000232168900031
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35178]
专题	金属研究所_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.