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Related papers: Classification of Local Conformal Nets. Case c < 1

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We classify two-dimensional local conformal nets with parity symmetry and central charge less than 1, up to isomorphism. The maximal ones are in a bijective correspondence with the pairs of A-D-E Dynkin diagrams with the difference of their…

Mathematical Physics · Physics 2011-04-06 Yasuyuki Kawahigashi , Roberto Longo

A Moebius covariant net of von Neumann algebras on S^1 is diffeomorphism covariant if its Moebius symmetry extends to diffeomorphism symmetry. We prove that in case the net is either a Virasoro net or any at least 4-regular net such an…

Operator Algebras · Mathematics 2009-11-10 Sebastiano Carpi , Mihaly Weiner

We discuss various aspects of the representation theory of the local nets of von Neumann algebras on the circle associated with positive energy representations of the Virasoro algebra (Virasoro nets). In particular we classify the local…

Operator Algebras · Mathematics 2009-11-10 Sebastiano Carpi

We study the general structure of Fermi conformal nets of von Neumann algebras on the circle, consider a class of topological representations, the general representations, that we characterize as Neveu-Schwarz or Ramond representations, in…

Mathematical Physics · Physics 2009-04-17 Sebastiano Carpi , Yasuyuki Kawahigashi , Roberto Longo

All non-local but relatively local irreducible extensions of Virasoro chiral CFTs with c<1 are classified. The classification, which is a prerequisite for the classification of local c<1 boundary CFTs on a two-dimensional half-space, turns…

Operator Algebras · Mathematics 2008-11-26 Y. Kawahigashi , R. Longo , U. Pennig , K. -H. Rehren

The conformal anomaly and the Virasoro algebra are fundamental aspects of 2D conformal field theory and conformally covariant models in planar random geometry. In this article, we explicitly derive the Virasoro algebra from an…

Mathematical Physics · Physics 2025-05-06 Sid Maibach , Eveliina Peltola

We provide an Operator Algebraic approach to N=2 chiral Conformal Field Theory and set up the Noncommutative Geometric framework. Compared to the N=1 case, the structure here is much richer. There are naturally associated nets of spectral…

Operator Algebras · Mathematics 2015-03-23 Sebastiano Carpi , Robin Hillier , Yasuyuki Kawahigashi , Roberto Longo , Feng Xu

This paper provides a further step in our program of studying superconformal nets over S^1 from the point of view of noncommutative geometry. For any such net A and any family Delta of localized endomorphisms of the even part A^gamma of A,…

Operator Algebras · Mathematics 2015-06-17 Sebastiano Carpi , Robin Hillier , Roberto Longo

We construct holomorphic local conformal framed nets extended from a tensor power of the Virasoro net with c=1/2 with a pair of binary codes (C,D) satisfying the conditions given by Lam and Yamauchi for holomorphic framed vertex operator…

Mathematical Physics · Physics 2014-08-22 Yasuyuki Kawahigashi , Noppakhun Suthichitranont

We show the strong graded locality of all unitary minimal W-algebras, so that they give rise to irreducible graded-local conformal nets. Among these unitary vertex superalgebras, up to taking tensor products with free fermion vertex…

Mathematical Physics · Physics 2025-11-03 Sebastiano Carpi , Tiziano Gaudio

In this paper we prove a general theorem on the extensions of local nets which was inspired by recent examples of exotic extensions for Virasoro nets with central charge less than one and earlier work on cosets and conformal inclusions.…

Quantum Algebra · Mathematics 2007-05-23 Feng Xu

We show that any solitonic representation of a conformal (diffeomorphism covariant) net on S^1 has positive energy and construct an uncountable family of mutually inequivalent solitonic representations of any conformal net, using nonsmooth…

Mathematical Physics · Physics 2019-05-22 Simone Del Vecchio , Stefano Iovieno , Yoh Tanimoto

We formulate conformal field theory in the setting of algebraic quantum field theory as Haag-Kastler nets of local observable algebras with diffeomorphism covariance on the two-dimensional Minkowski space. We then obtain a decomposition of…

Mathematical Physics · Physics 2007-05-23 Yasuyuki Kawahigashi

We give an exposition on the current status of classification of operator algebraic conformal field theories. We explain roles of complete rationality and alpha-induction for nets of subfactors in such a classification and present the…

Operator Algebras · Mathematics 2007-05-23 Yasuyuki Kawahigashi

Starting from a real standard subspace of a Hilbert space and a representation of the translation group with natural properties, we construct and analyze for each endomorphism of this pair a local, translationally covariant net of standard…

Mathematical Physics · Physics 2015-06-19 Gandalf Lechner , Roberto Longo

In this article we give new examples of models in boundary quantum field theory, i.e. local time-translation covariant nets of von Neumann algebras, using a recent construction of Longo and Witten, which uses a local conformal net A on the…

Mathematical Physics · Physics 2012-08-20 Marcel Bischoff

We apply an idea of framed vertex operator algebras to a construction of local conformal nets of (injective type III_1) factors on the circle corresponding to various lattice vertex operator algebras and their twisted orbifolds. In…

Operator Algebras · Mathematics 2007-05-23 Yasuyuki Kawahigashi , Roberto Longo

A convenient framework to treat massless two-dimensional scattering theories has been established by Buchholz. In this framework, we show that the asymptotic algebra and the scattering matrix completely characterize the given theory under…

Mathematical Physics · Physics 2017-09-26 Yoh Tanimoto

We classify Haag-dual Poincar\'e covariant subsystems $\B\subset \F$ of a graded-local net $\F$ on 4D Minkowski spacetime which satisfies standard assumptions and has trivial superselection structure. The result applies to the canonical…

Operator Algebras · Mathematics 2011-09-30 Sebastiano Carpi , Roberto Conti

A family of quantum fields is said to be strongly local if it generates a local net of von Neumann algebras. There are few methods of showing directly strong locality of a quantum field. Among them, linear energy bounds are the most widely…

Mathematical Physics · Physics 2023-05-05 Sebastiano Carpi , Yoh Tanimoto , Mihály Weiner
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