Vanishing of Rabinowitz Floer homology on negative line bundles

Abstract

Following [Fra08, AF14] we construct Rabinowitz Floer homology for negative line bundles over symplectic manifolds and prove a vanishing result. In [Rit14] Ritter showed that symplectic homology of these spaces does not vanish, in general. Thus, the theorem $\mathrm{SH}=0\iff \mathrm{RFH}=0$, [Rit13], does not extend beyond the symplectically aspherical situation. We give a conjectural explanation in terms of the Cieliebak-Frauenfelder-Oancea long exact sequence [CFO10].

arXiv comment24 pages; The condition on the radius of a circle subbundle in the vanishing result is now stated explicitly; see Remark 1.3.(6)

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