标题： 拓扑解缠器用于价键固态链 显示英文标题

标题： Topological disentangler for the valence-bond-solid chain

摘要： 我们讨论处于Haldane相中的S=1量子自旋链的拓扑解缠器。 我们首先指出Kennedy-Tasaki(KT)的非局部幺正变换是Affleck-Kennedy-Lieb-Tasaki模型的完美解缠器。 然后我们证明KT变换可以作为一对解缠器的组合来重建。 最后，我们表明KT变换可以被视为一种拓扑解缠器，它可以选择性地解缠S=1海森堡链纠缠谱中的二重简并。 显示英文摘要

摘要： We discuss topological disentangler for S=1 quantum spin chains in the Haldane phase. We first point out that Kennedy-Tasaki's(KT) nonlocal unitary transformation is the perfect disentangler for Affleck-Kennedy-Lieb-Tasaki model. We then demonstrate that the KT transformation can be reconstructed as an assembly of pair disentanglers. Finally, we show that the KT transformation can be regarded as a topological disentangler, which selectively disentangles the double-fold degeneracy in the entanglement spectrum of the S=1 Heisenberg chain.