Topological disentangler for the valence-bond-solid chain
Statistical Mechanics
2012-01-11 v1 Quantum Physics
Abstract
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.
Keywords
Cite
@article{arxiv.1011.3277,
title = {Topological disentangler for the valence-bond-solid chain},
author = {Kouichi Okunishi},
journal= {arXiv preprint arXiv:1011.3277},
year = {2012}
}
Comments
4 pages, 3 figures