Topologically distinct classes of valence-bond solid states with their parent Hamiltonians

Hong-Hao Tu, Guang-Ming Zhang, Tao Xiang, Zheng-Xin Liu, and Tai-Kai Ng
Phys. Rev. B 80, 014401 – Published 1 July 2009

Abstract

We present a general method to construct one-dimensional translationally invariant valence-bond solid states with a built-in Lie group G and derive their matrix product representations. The general strategies to find their parent Hamiltonians are provided so that the valence-bond solid states are their unique ground states. For quantum integer-spin-S chains, we discuss two topologically distinct classes of valence-bond solid states: one consists of two virtual SU(2) spin-J variables in each site and another is formed by using two SO(2S+1) spinors. Among them, a spin-1 fermionic valence-bond solid state, its parent Hamiltonian, and its properties are discussed in detail. Moreover, two types of valence-bond solid states with SO(5) symmetries are further generalized and their respective properties are analyzed as well.

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  • Received 6 April 2009

DOI:https://doi.org/10.1103/PhysRevB.80.014401

©2009 American Physical Society

Authors & Affiliations

Hong-Hao Tu and Guang-Ming Zhang*

  • Department of Physics, Tsinghua University, Beijing 100084, China

Tao Xiang

  • Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China and Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190, China

Zheng-Xin Liu and Tai-Kai Ng

  • Department of Physics, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China

  • *gmzhang@mail.tsinghua.edu.cn

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Vol. 80, Iss. 1 — 1 July 2009

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