Topological properties of a Valence-Bond-Solid

[摘要] We present a projector quantum Monte Carlo study of the topological properties of the valence-bond-solid ground state in the J-Q3spin model on the square lattice. The winding number is a topological number counting the number of domain walls in the system and is a good quantum number in the thermodynamic limit. We study the finite-size behavior and obtain the domain wall energy density for a topological nontrivial valence-bond-solid state.

[发布机构] Department of Physics, Beijing Normal University, Beijing; 100875, China^1;State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Science, Beijing; 100190, China^2;Department of Physics, Boston University, 590 Commonwealth Avenue, Boston; MA; 02215, United States^3

[效力级别] 计算机科学 [学科分类] 计算机科学（综合）

[关键词] Domain wall energy;Quantum monte carlo studies;Quantum numbers;Square lattices;Thermodynamic limits;Topological number;Topological properties;Valence-bond solids