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On the modular operator of mutli-component regions in chiral CFT (1904.08201v2)
Published 17 Apr 2019 in hep-th, math-ph, math.MP, and quant-ph
Abstract: We introduce a new approach to find the Tomita-Takesaki modular flow for multi-component regions in general chiral conformal field theory. Our method is based on locality and analyticity of primary fields as well as the so-called Kubo-Martin-Schwinger (KMS) condition. These features can be used to transform the problem to a Riemann-Hilbert problem on a covering of the complex plane cut along the regions, which is equivalent to an integral equation for the matrix elements of the modular Hamiltonian. Examples are considered.
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