Interferometric approaches to atom-surface van der Waals interactions in atomic mirrors

We analyze the possibilities of approaching atom-surface interactions through their contribution to the atomic matter de Broglie wave phase, in an interferometer based on an evanescent light atomic mirror. The surface interactions produce an additional phase shift that is evaluated to a few times pi for a neon atom in a metastable state. We propose and investigate an experimental procedure that uses the principles of polarization (for instance, Stem-Gerlach) interferometers in order to monitor these long-range interactions (van der Waals, Casimir-Polder, etc.) between a ground-state or metastable-state atom and either a metallic or a dielectric surface. Our approach gives access to thr differential phase shift between Zeeman sublevels, and should then be sensitive to an eventual anisotropy of the atom-surface interaction.