\(c=I\) conformal field theories on Riemann surfaces
type: Item
instance of: scholarly article
title: \(c=I\) conformal field theories on Riemann surfaces
zbMATH Open document ID: 0649.32019
DOI: 10.1007/BF01224132
author: Herman Verlinde
author: Robbert Dijkgraaf
author: Erik Verlinde
published in: Communications in Mathematical Physics
publication date: 1988-01-01T00:00:00Z
review text: The commented paper studies the class of Gaussian \(c=I\) conformal field theories which consists of the torus models describing a free massless scalar field \(\phi(z,\bar z)\) compactified on the cirl \({\mathbb{R}}/2\pi R{\mathbb{Z}}\) with the action \(({1/2}\pi) \int d^ 2z\partial \phi {\bar \partial}\phi\) and \({\mathbb{Z}}_ 2\) orbifold models which are obtained from the corresponding torus models identifying \(\phi\) with \(-\phi\). The main purpose of the paper is to investigate the structure of these theories on higher genus Riemann surfaces. The authors analyse the partition functions on arbitrary Riemann surfaces and their behaviour under the action of modular group. The correlation functions are obtained through factorization of the partition function at the boundary of moduli space. To analyze the \(Z_ 2\) orbifold models the authors use the theory of double coverings of Riemann surfaces and theta- functions defined on Prym varieties. The equivalence of the \(R=\sqrt{2}\) orbifold and \(R=(1/2)\sqrt{2}\) torus models gives a physical interpretation of nontrivial identities between theta-functions known as Schottky relations. It appears that in contrast with toroidal models the orbifold partition functions are sensitive to the Torelli group. The operator formalism on Riemann surfaces for both torus and orbifold models is constructed and the relation with the \(\tau\)-functions of the KP and BKP hierarchy is discussed.
Mathematics Subject Classification ID: 32G15
Mathematics Subject Classification ID: 35Q99
Mathematics Subject Classification ID: 81T08
Mathematics Subject Classification ID: 30F99
zbMATH DE Number: 4059824
zbMATH Keywords: conformal field theories
zbMATH Keywords: Riemann surfaces
zbMATH Keywords: orbifold partition functions
MaRDI profile type: Publication
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full work available at URL: https://doi.org/10.1007/bf01224132
OpenAlex ID: W2022544578
description: scientific article; zbMATH DE number 4059824