Topological order following a quantum quench

D.I. Tsomokos, A. Hamma, W. Zhang, S. Haas, R. Fazio

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    36 Citations (Scopus)
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    Abstract

    We determine the conditions under which topological order survives a rapid quantum quench. Specifically, we consider the case where a quantum spin system is prepared in the ground state of the toric code model and, after the quench, it evolves with a Hamiltonian that does not support topological order. We provide analytical results supported by numerical evidence for a variety of quench Hamiltonians. The robustness of topological order under nonequilibrium situations is tested by studying the topological entropy and a dynamical measure, which makes use of the similarity between partial density matrices obtained from different topological sectors.
    Original languageEnglish
    JournalPhysical Review A
    Volume80
    Issue number6
    DOIs
    Publication statusPublished - 2009

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