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Topological Entanglement Renyi Entropy and Reduced Density Matrix Structure

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arxiv 0909.3305 v2 pith:XUSBVLD7 submitted 2009-09-17 cond-mat.str-el quant-ph

Topological Entanglement Renyi Entropy and Reduced Density Matrix Structure

classification cond-mat.str-el quant-ph
keywords topologicalentanglementrenyialphadensityentropiesentropyordered
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 2 Pith papers

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