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Symmetry-protected topological order and negative-sign problem for SO(N) bilinear-biquadratic chains

机译:SO(N)双线性-双二次链的对称保护拓扑序和负号问题

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摘要

Using a generalized Jordan-Wigner transformation combined with the defining representation of the SO(N) spin, we map the SO(N) bilinear-biquadratic (BLBQ) spin chain into the N-color bosonic particle model. We find that, when the Jordan-Wigner transformation disentangles the symmetry-protected topological entanglement, this bosonic model becomes negative-sign-free in the context of quantum Monte Carlo simulation. For the SO(3) case, moreover, the Kennedy-Tasaki transformation for the 5 = 1 BLBQ chain, which is also a topological disentangler, derives the same bosonic model through the dimer-R bases. We present the temperature dependence of the energy, entropy, and string order parameter for the SO(N = 3,4,5) BLBQ chains by a world-line Monte Carlo simulation for the N-color bosonic particle model.
机译:使用广义Jordan-Wigner变换与SO(N)自旋的定义表示相结合,我们将SO(N)双线性双二次(BLBQ)自旋链映射到N颜色玻色子粒子模型中。我们发现,当Jordan-Wigner变换解开对称性保护的拓扑纠缠时,该玻色子模型在量子Monte Carlo模拟的情况下变为无负号。此外,对于SO(3)情况,5 = 1 BLBQ链的Kennedy-Tasaki变换(也是拓扑解缠结器)通过二聚体R基得出了相同的玻色子模型。我们通过世界范围的N色玻色子粒子模型的蒙特卡洛模拟,给出了SO(N = 3,4,5)BLBQ链的能量,熵和弦序参数的温度依赖性。

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