Topological term in the non-linear sigma model of the SO(5) spin chains

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	Lee, DH; Zhang, GM; Xiang, T; Zhang, GM (reprint author), Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
	Topological term in the non-linear sigma model of the SO(5) spin chains
发表期刊	NUCLEAR PHYSICS B
语种	英语
关键词	Bond Ground-states Valence-bond Quantum Antiferromagnets Systems
摘要	We show that there is a topological (Berry phase) term in the non-linear sigma model description of the SO(5) spin chain. It distinguishes the linear and projective representations of the SO(5) symmetry group, in exact analogy to the well-known theta-term of the SO(3) spin chain. The presence of the topological term is due to the fact that pi(2)(SO(5)/SO(3) x SO(2)) = Z. We discuss the implication of our results on the spectra of the SO(5) spin chain, and connect it with a recent solvable SO(5) spin model which exhibits valence bond solid ground state and edge degeneracy. (c) 2011 Elsevier B.V. All rights reserved.
	2011
ISSN	0550-3213
卷号	846 期号:3 页码:607-615
学科领域	Physics
收录类别	SCI
项目资助者	DOE [DE-AC02-05CH11231]; NSF-China; MOST, China ; DOE [DE-AC02-05CH11231]; NSF-China; MOST, China ; DOE [DE-AC02-05CH11231]; NSF-China; MOST, China ; DOE [DE-AC02-05CH11231]; NSF-China; MOST, China
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/14350
专题	理论物理所科研产出_SCI论文
通讯作者	Zhang, GM (reprint author), Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
推荐引用方式 GB/T 7714	Lee, DH,Zhang, GM,Xiang, T,et al. Topological term in the non-linear sigma model of the SO(5) spin chains[J]. NUCLEAR PHYSICS B,2011,846(3):607-615.
APA	Lee, DH,Zhang, GM,Xiang, T,&Zhang, GM .(2011).Topological term in the non-linear sigma model of the SO(5) spin chains.NUCLEAR PHYSICS B,846(3),607-615.
MLA	Lee, DH,et al."Topological term in the non-linear sigma model of the SO(5) spin chains".NUCLEAR PHYSICS B 846.3(2011):607-615.

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