Topological disentangler for the valence-bond-solid chain

被引：10
|
作者：
Okunishi, Kouichi [1 ]
机构：
[1] Niigata Univ, Fac Sci, Dept Phys, Niigata 9502181, Japan
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 10期
关键词：
FUNCTION RENORMALIZATION-GROUP; QUANTUM SPIN CHAINS; GROUND-STATES; ANTIFERROMAGNETS; SYMMETRY;
D O I：
10.1103/PhysRevB.83.104411
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We discuss the topological disentangler for S = 1 quantum spin chains in the Haldane phase. We first point out that theKennedy-Tasaki (KT) nonlocal unitary transformation is the perfect disentangler for the 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 twofold degeneracy in the entanglement spectrum of the S = 1 Heisenberg chain.
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页数：4
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