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• W2007979454 endingPage "P02001" @default.
• W2007979454 startingPage "P02001" @default.
• W2007979454 abstract "In this paper we develop a new approach to the investigation of the bi-partite entanglement entropy in integrable quantum spin chains. Our method employs the well-known replica trick, thus taking a replica version of the spin chain model as starting point. At each site i of this new model we construct an operator T_i which acts as a cyclic permutation among the n replicas of the model. Infinite products of T_i give rise to local operators, precursors of branch-point twist fields of quantum field theory. The entanglement entropy is then expressed in terms of correlation functions of such operators. Employing this approach we investigate the von Neumann and R'enyi entropies of a particularly interesting quantum state occurring as a limit (in a compact convergence topology) of the antiferromagnetic XXZ quantum spin chain. We find that, for large sizes, the entropy scales logarithmically, but not conformally." @default.
• W2007979454 created "2016-06-24" @default.
• W2007979454 creator A5035728778 @default.
• W2007979454 creator A5067810738 @default.
• W2007979454 date "2011-02-01" @default.
• W2007979454 modified "2023-09-25" @default.
• W2007979454 title "Permutation operators, entanglement entropy, and the<i>XXZ</i>spin chain in the limit Delta to-1^+" @default.
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• W2007979454 doi "https://doi.org/10.1088/1742-5468/2011/02/p02001" @default.
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