Surface Diffusion by Means of Stochastic Wave Functions. The Ballistic Regime

Stochastic wave function formalism is briefly introduced and applied to study the dynamics of open quantum systems; in particular, diffusion Xe atoms adsorbed on a Pt(111) surface. By starting from Lindblad functional within microscopic Caldeira–Leggett model for linear dissipation, stochastic differential equation (Ito^-type equation) straightforwardly obtained. The so-called intermediate scattering ballistic regime obtained, which observable Helium spin echo experiments. An ideal two-dimensional gas has been observed this regime, leading behaving as Gaussian function. influence surface–adsorbate interaction also analyzed by using potential two interactions describing flat corrugated surfaces. Very low surface coverages are considered and, therefore, adsorbate–adsorbate safely neglected. Good agreement when our numerical results compared with corresponding experimental previous standard Langevin simulations.