The virtually abelian image conjecture for unitary braided vector spaces

Let VV be a finite-dimensional complex vector space and let cAut(V2)c\in\operatorname{Aut}(V^{\otimes 2}) be a unitary solution of the Yang–Baxter equation, so that (V,c)(V,c) is a unitary braided vector space (BVS). For each nn, let ρc:BnGL(Vn)\rho^c:\mathcal{B}_n\to\operatorname{GL}(V^{\otimes n}) be the braid-group representation defined by

ρc(σi)=I(i1)cI(ni1).\rho^c(\sigma_i)=I^{\otimes(i-1)}\otimes c\otimes I^{\otimes(n-i-1)}.

Virtually abelian image conjecture. For every nn, the image ρc(Bn)\rho^c(\mathcal{B}_n) is virtually abelian; moreover, if cc has finite order, then ρc(Bn)\rho^c(\mathcal{B}_n) is finite.

This conjecture seeks a uniform description of braid-group images arising from unitary braided vector spaces. The finite-order case predicts finiteness, while the general case predicts virtual abelianness; the supplied text gives no resolution status.

Sources & referencesView supporting material

Primary source

César Galindo and Eric C. Rowell, “Braid Representations from Unitary Braided Vector Spaces”, arXiv:1312.5557 (2013).

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