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1D valence bond solids in a magnetic field
[摘要] A Valence bond solid (VBS) is a nonmagnetic, long-range ordered state of a quantum spin system where local spin singlets are formed in some regular pattern. We here study the competition between VBS order and a fully polarized ferromagnetic state as function of an external magnetic field in a one-dimensional extended Heisenberg model - the J-Q2model - using stochastic series expansion (SSE) quantum Monte Carlo simulations with directed loop updates. We discuss the ground state phase diagram.
[发布日期]  [发布机构] Department of Physics, Boston University, 590 Commonwealth Avenue, Boston; MA; 02215, United States^1
[效力级别] 计算机科学 [学科分类] 计算机科学(综合)
[关键词] External magnetic field;Ferromagnetic state;Ground state phase diagram;Heisenberg models;Long-range-ordered state;Quantum Monte Carlo simulations;Quantum spin systems;Valence-bond solids [时效性] 
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