Topological Entanglement Renyi Entropy and Reduced Density Matrix Structure
Strongly Correlated Electrons
2010-01-05 v2 Quantum Physics
Abstract
We generalize the topological entanglement entropy to a family of topological Renyi entropies parametrized by a parameter alpha, in an attempt to find new invariants for distinguishing topologically ordered phases. We show that, surprisingly, all topological Renyi entropies are the same, independent of alpha for all non-chiral topological phases. This independence shows that topologically ordered ground-state wavefunctions have reduced density matrices with a certain simple structure, and no additional universal information can be extracted from the entanglement spectrum.
Cite
@article{arxiv.0909.3305,
title = {Topological Entanglement Renyi Entropy and Reduced Density Matrix Structure},
author = {Steven T. Flammia and Alioscia Hamma and Taylor L. Hughes and Xiao-Gang Wen},
journal= {arXiv preprint arXiv:0909.3305},
year = {2010}
}
Comments
4 pages, v2: published version