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arXiv · 2311.18267

Extensible positive loops and vanishing of symplectic cohomology

Dylan Cant·Jakob Hedicke·Eric Kilgore
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Abstract

The symplectic cohomology of certain symplectic manifolds $W$ with non-compact ends modelled on the positive symplectization of a compact contact manifold $Y$ is shown to vanish whenever there is a positive loop of contactomorphisms of $Y$ which extends to a loop of Hamiltonian diffeomorphisms of $W$. An open string version of this result is also proved: the wrapped Floer cohomology of a Lagrangian $L$ with ideal Legendrian boundary $\Lambda$ is shown to vanish if there is a positive loop $\Lambda_{t}$ based at $\Lambda$ which extends to an exact loop of Lagrangians based at $L$. Various examples of such loops are considered. Applications include the construction of exotic compactly supported symplectomorphisms and exotic fillings of $\Lambda$.

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Dylan Cant, Jakob Hedicke, Eric Kilgore. 2023-11-30. Extensible positive loops and vanishing of symplectic cohomology. https://arxiv.org/abs/2311.18267

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