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arXiv:2107.13925 · Journal of High Energy Physics

Crossing-symmetric twist field correlators and entanglement negativity in minimal CFTs

Filiberto Ares, Raoul Santachiara, Jacopo Viti

Published Oct 1, 2021• 15 citations
arXivHTMLPDF

Abstract

Abstract We study conformal twist field four-point functions on a ℤN orbifold. We examine in detail the case N = 3 and analyze theories obtained by replicated N-times a minimal model with central charge c < 1. A fastly convergent expansion of the twist field correlation function in terms of sphere conformal blocks with central charge Nc is obtained by exploiting covering map techniques. We discuss extensive applications of the formalism to the entanglement of two disjoint intervals in CFT, in particular we propose a conformal block expansion for the partially transposed reduced density matrix. Finally, we refine the bounds on the structure constants of unitary CFTs determined previously by the genus two modular bootstrap.

DOI
10.1007/jhep10(2021)175

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