A $T1$ criterion for Schrödinger-Calderón-Zygmund operators with exponential decay
We establish the boundedness of exponential Schrödinger-Calderón-Zygmund operators on weighted $BMO_ρ^α(w)$ spaces via a $T1$ criterion, where the weights belong to classes that capture the exponential decay of the operators, and $ρ$ is a critical radius function. Specifically, we prove that the boundedness of such an operator $T$ on $BMO_ρ^α(w)$ is equivalent to a natural oscillation condition on $T1$ over sub-critical balls. The weight classes considered, introduced in connection with $ρ$, include and extend the classical $A_p^ρ$ weights, and are well-adapted to the exponential decay of the kernels. As applications, we derive weighted endpoint estimates for several operators associated to the generalized Schrödinger operator $\mathcal{L}_μ=-Δ+μ$, including Riesz transforms, Laplace transform-type multipliers, maximal operators for the heat and Poisson semigroups, Littlewood-Paley functions and fractional integral operators. When $dμ(x)=V(x)dx$, the results above extend the known endpoint estimates to larger classes of weights.