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We completely classify diffeomorphism covariant local nets of von Neumann algebras on the circle with central charge c less than 1. The irreducible ones are in bijective correspondence with the pairs of A-D_{2n}-E_{6,8} Dynkin diagrams such…

Mathematical Physics · Physics 2016-09-07 Yasuyuki Kawahigashi , Roberto Longo

We describe a coordinate-free notion of conformal nets as a mathematical model of conformal field theory. We define defects between conformal nets and introduce composition of defects, thereby providing a notion of morphism between…

Algebraic Topology · Mathematics 2010-10-12 Arthur Bartels , Christopher L. Douglas , André G. Henriques

Given the Hamiltonian realisation of a topological (3+1)d gauge theory with finite group $G$, we consider a family of tensor network representations of its ground state subspace. This family is indexed by gapped boundary conditions encoded…

Strongly Correlated Electrons · Physics 2022-09-07 Clement Delcamp

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

Quantification of symmetries in complex networks is typically done globally in terms of automorphisms. Extending previous methods to locally assess the symmetry of nodes is not straightforward. Here we present a new framework to quantify…

We classify the possible discrete (finite) symmetries of two--dimensional critical models described by unitary minimal conformally invariant theories. We find that all but six models have the group Z_2 as maximal symmetry. Among the six…

High Energy Physics - Theory · Physics 2009-10-31 P. Ruelle , O. Verhoeven

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 introduce two-dimensional tensor network representations of finite groups carrying a 4-cocycle index. We characterize the associated gapped (2+1)D phases that emerge when these anomalous symmetries act on tensor network ground states. We…

Quantum Physics · Physics 2025-07-23 José Garre-Rubio , András Molnár

We study sharply localized sectors, known as sectors of DHR-type, of a net of local observables, in arbitrary globally hyperbolic spacetimes with dimension $\geq 3$. We show that these sectors define, has it happens in Minkowski space, a…

Mathematical Physics · Physics 2009-11-10 Giuseppe Ruzzi

We classify two-dimensional purely chiral conformal field theories which are defined on two-dimensional surfaces equipped with spin structure and have central charge less than or equal to 16, and discuss their duality webs. This result can…

High Energy Physics - Theory · Physics 2024-03-06 Philip Boyle Smith , Ying-Hsuan Lin , Yuji Tachikawa , Yunqin Zheng

We extend the notion of central charge superspace to the case of local supersymmetry. Gauged central charge transformations are identified as diffeomorphisms at the same footing as space-time diffeomorphisms and local supersymmetry…

High Energy Physics - Theory · Physics 2009-10-31 G. Akemann , R. Grimm , M. Hasler , C. Herrmann

We study a natural model of random 2-dimensional cubical complex which is a subcomplex of an n-dimensional cube, and where every possible square $2$-face is included independently with probability p. Our main result is to exhibit a sharp…

Combinatorics · Mathematics 2020-09-21 Matthew Kahle , Elliot Paquette , Érika Roldán

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

Superconformal geometries in spacetime dimensions $D=3,4,{5}$ and $6$ are discussed in terms of local supertwistor bundles over standard superspace. These natually admit superconformal connections as matrix-valued one-forms. In order to…

High Energy Physics - Theory · Physics 2021-05-05 P. S. Howe , U. Lindström

We prove that finite-index conformal nets are fully dualizable objects in the 3-category of conformal nets. Therefore, assuming the cobordism hypothesis applies, there exists a local framed topological field theory whose value on the point…

Algebraic Topology · Mathematics 2019-05-10 Arthur Bartels , Christopher L. Douglas , André Henriques

As an application of Roberts' cohomology (net cohomology), we prove the completeness of the DHR sectors of the local observables of the model in the title, detailed in [8]. This result is achieved via the triviality of the net 1-cohomology,…

Mathematical Physics · Physics 2010-05-07 Fabio Ciolli

We discuss a correspondence between certain contact pairs on the one hand, and certain locally conformally symplectic forms on the other. In particular, we characterize these structures through suspensions of contactomorphisms. If the…

Symplectic Geometry · Mathematics 2013-01-29 G. Bande , D. Kotschick

This is the first of two companion papers in which a thorough study of the normal form and the first integrability conditions arising from {\em bi-conformal vector fields} is presented. These new symmetry transformations were introduced in…

Differential Geometry · Mathematics 2016-08-16 Alfonso García-Parrado Gómez-Lobo

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 establish a "second vanishing theorem" for local cohomology modules over regular rings of unramified mixed characteristic, which relates the connectedness of the spectrum of a ring with the vanishing of local cohomology. Applying this,…

Commutative Algebra · Mathematics 2016-09-20 Daniel J. Hernández , Luis Núñez-Betancourt , Felipe Pérez , Emily E. Witt
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