Property (QT) for 3-manifold groups

Abstract

According to Bestvina-Bromberg-Fujiwara, a finitely generated group is said to have property (QT) if it acts isometrically on a finite product of quasi-trees so that orbital maps are quasi-isometric embeddings. We prove that the fundamental group ${\pi }_1(M)$ of a compact, connected, orientable 3-manifold $M$ has property (QT) if and only if no summand in the sphere-disc decomposition of $M$ supports either Sol or Nil geometry. In particular, all compact, orientable, irreducible 3-manifold groups with nontrivial torus decomposition and not supporting Sol geometry have property (QT). In the course of our study, we establish property (QT) for the class of Croke-Kleiner admissible groups and of relatively hyperbolic groups under natural assumptions has property (QT).

arXiv comment40 pages, 2 figures. Version 4. We filled the gap of Version 2 which gives the characterization of property (QT) for 3-manifold groups. The title is thus changed back

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Cited by in corpus (1)

• Almost invariant CND kernels and proper uniformly Lipschitz actions on subspaces of $L^1$