Stable Isoperimetric Ratios and the Hodge Laplacian of Hyperbolic Manifolds

Cameron Gates Rudd

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arXiv · 2101.00301

Stable Isoperimetric Ratios and the Hodge Laplacian of Hyperbolic Manifolds

Cameron Gates Rudd

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Abstract

We show that for a closed hyperbolic 3-manifold the size of the first eigenvalue of the Hodge Laplacian acting on coexact 1-forms is comparable to an isoperimetric ratio relating geodesic length and stable commutator length with comparison constants that depend polynomially on the volume and on a lower bound on injectivity radius, refining estimates of Lipnowski and Stern. We use this estimate to show that there exist sequences of closed hyperbolic 3-manifolds with injectivity radius bounded below and volume going to infinity for which the 1-form Laplacian has spectral gap vanishing exponentially fast in the volume.

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Cameron Gates Rudd. 2021-01-01. Stable Isoperimetric Ratios and the Hodge Laplacian of Hyperbolic Manifolds. https://arxiv.org/abs/2101.00301

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