Entanglement entropy of two disjoint intervals and the recursion formula for conformal blocks
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Publication:3303224
DOI10.1088/1742-5468/AAE5A8zbMATH Open1456.81090arXiv1805.05975OpenAlexW3098994128WikidataQ128982230 ScholiaQ128982230MaRDI QIDQ3303224
Author name not available (Why is that?)
Publication date: 11 August 2020
Published in: (Search for Journal in Brave)
Abstract: We reconsider the computation of the entanglement entropy of two disjoint intervals in a (1+1) dimensional conformal field theory by conformal block expansion of the 4-point correlation function of twist fields. We show that accurate results may be obtained by taking into account several terms in the operator product expansion (OPE) of twist fields and by iterating the Zamolodchikov recursion formula for each conformal block. We perform a detailed analysis for the Ising conformal field theory and for the free compactified boson. Each term in the conformal block expansion can be easily analytically continued and so this approach also provides a good approximation for the von Neumann entropy.
Full work available at URL: https://arxiv.org/abs/1805.05975
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