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Governed by locality, we explore a connection between unitary braid group representations associated to a unitary $R$-matrix and to a simple object in a unitary braided fusion category. Unitary $R$-matrices, namely unitary solutions to the…

Representation Theory · Mathematics 2015-05-19 Eric C. Rowell , Zhenghan Wang

This is a systematic introduction for physicists to the theory of algebras and groups with braid statistics, as developed over the last three years by the author. There are braided lines, braided planes, braided matrices and braided groups…

High Energy Physics - Theory · Physics 2008-02-03 Shahn Majid

We prove that a finite braided tensor category A is invertible in the Morita 4-category BrTens of braided tensor categories if, and only if, it is non-degenerate. This includes the case of semisimple modular tensor categories, but also…

Quantum Algebra · Mathematics 2021-08-25 Adrien Brochier , David Jordan , Pavel Safronov , Noah Snyder

We prove that representations of the braid groups coming from weakly group-theoretical braided fusion categories have finite images.

Quantum Algebra · Mathematics 2019-11-11 Jason Green , Dmitri Nikshych

We prove that every slightly degenerate braided fusion category admits a minimal nondegenerate extension, and hence that every pseudo-unitary super modular tensor category admits a minimal modular extension. This completes the program of…

Quantum Algebra · Mathematics 2026-02-18 Theo Johnson-Freyd , David Reutter

We consider the group of unrestricted virtual braids, describe its structure and explore its relations with fused links. Also, we define the groups of flat virtual braids and virtual Gauss braids and study some of their properties, in…

Geometric Topology · Mathematics 2016-03-04 Valeriy Bardakov , Paolo Bellingeri , Celeste Damiani

We give an alternative presentation of braided monoidal categories. Instead of the usual associativity and braiding we have just one constraint (the b-structure). In the unital case, the coherence conditions for a b-structure are shown to…

Category Theory · Mathematics 2013-07-24 Alexei Davydov , Ingo Runkel

We introduce the condensed fiber product of two $G$-crossed braided fusion categories, generalizing existing constructions in the literature. We show that this product is closely related to the cohomological construction known as zesting.…

Quantum Algebra · Mathematics 2024-12-05 Colleen Delaney , César Galindo , Julia Plavnik , Eric C. Rowell , Qing Zhang

In this paper we describe how Grothendieck groups of coherent sheaves and locally free sheaves can be used to describe type II D-branes, in the case that all D-branes are wrapped on complex varieties and all connections are holomorphic. Our…

High Energy Physics - Theory · Physics 2008-11-26 Eric R. Sharpe

Categories over a field $k$ can be graded by different groups in a connected way; we consider morphisms between these gradings in order to define the fundamental grading group. We prove that this group is isomorphic to the fundamental group…

Category Theory · Mathematics 2013-03-12 Claude Cibils , Maria Julia Redondo , Andrea Solotar

In this paper, we define generalized braid theories in alignment with the language of Fenn and Bartholomew for knot theories, and compute a generating set for the pure generalized braid theories. Using this, we prove that every oriented…

Geometric Topology · Mathematics 2024-12-02 Neha Nanda , Manpreet Singh

Given a category, one may construct slices of it. That is, one builds a new category whose objects are the morphisms from the category with a fixed codomain and morphisms certain commutative triangles. If the category is a groupoid, so that…

Category Theory · Mathematics 2021-08-16 Nicholas Cooney , Jan E. Grabowski

We introduce the notion of a braiding on a skew monoidal category, whose curious feature is that the defining isomorphisms involve three objects rather than two. These braidings are shown to arise from, and classify, cobraidings (also known…

Category Theory · Mathematics 2020-01-29 John Bourke , Stephen Lack

We give a method to produce representations of the braid group $B_n$ of $n-1$ generators ($n\leq \infty$). Moreover, we give sufficient conditions over a non unitary representation for being of this type. This method produces examples of…

Representation Theory · Mathematics 2009-09-29 Claudia Maria Egea , Esther Galina

It was well known that there are $e$-particles and $m$-strings in the 3-dimensional (spatial dimension) toric code model, which realizes the 3-dimensional $\mathbb{Z}_2$ topological order. Recent mathematical result, however, shows that…

Strongly Correlated Electrons · Physics 2020-12-15 Liang Kong , Yin Tian , Zhi-Hao Zhang

We characterize a natural class of modular categories of prime power Frobenius-Perron dimension as representation categories of twisted doubles of finite p-groups. We also show that a nilpotent braided fusion category C admits an analogue…

Quantum Algebra · Mathematics 2007-05-23 Vladimir Drinfeld , Shlomo Gelaki , Dmitri Nikshych , Victor Ostrik

Fully braided analog of Faddeev-Reshetikhin-Takhtajan construction of quasitriangular bialgebra $A(X,R)$ is proposed. For given pairing $C$ factor-algebra $A(X,R;C)$ is a dual quantum braided group. Corresponding inhomogeneous quantum group…

q-alg · Mathematics 2008-02-03 Yuri Bespalov

We describe the equivalence groupoid of the class of general Burgers - Korteweg - de Vries equations with space-dependent coefficients. This class is shown to reduce by a family of equivalence transformations to a subclass whose usual…

Mathematical Physics · Physics 2019-09-04 Stanislav Opanasenko

We give a characterization of finite pointed tensor categories obtained as de-equivariantizations of finite-dimensional pointed Hopf algebras over abelian groups only in terms of the (cohomology class of the) associator of the pointed part.…

Quantum Algebra · Mathematics 2017-11-16 Iván Angiono , César Galindo

We extend the classical construction by Noether of crossed product algebras, defined by finite Galois field extensions, to cover the case of separable (but not necessarily finite or normal) field extensions. This leads us naturally to…

Rings and Algebras · Mathematics 2020-06-05 Juan Cala , Patrik Nystedt , Héctor Pinedo