If is even, the resonances of the Schrödinger operator on with are points on , the logarithmic cover of . We show that for fixed sign potentials and for , the resonance counting function for the th sheet of has maximal order of growth.
Cite this article
T. J. Christiansen, Lower bounds for resonance counting functions for Schrödinger operators with fixed sign potentials in even dimensions. J. Spectr. Theory 5 (2015), no. 3, pp. 571–597DOI 10.4171/JST/107