Stability estimates for the recovery of the nonlinearity from scattering data

We prove stability estimates for the problem of recovering the nonlinearity from scattering data. We focus our attention on nonlinear Schrödinger equations of the form $$(i{\mathrm{\partial }}_t+\mathrm{\Delta })u=a(x)\mathrm{\mid }u{\mathrm{\mid }}^{p}u$$ in three space dimensions, with $p\in [\frac{4}{3},4]$ and $a\in W^{1,\mathrm{\infty }}$.