The abstract of the paper "Asymptotic Completeness for Long-Range Many-Particle Systems with Stark Effect"

By Tadayoshi Adachi and Hideo Tamura
Journal of Mathematical Sciences, The University of Tokyo 2 (1995), 77--116.

We prove the existence and the asymptotic completeness of the Graf-type modified wave operators for many-particle Stark Hamiltonians with long-range potentials.