Tuning interatomic resonance interactions between two atoms close to a surface

James Keaveney

Qi-Zhang Yuan, Chun-Hua Yuan, Weiping Zhang

We study theoretically the resonance interaction between two atoms located near a dielectric-plate surface with quantum electrodynamics. One atom is initially excited and the other one is in the ground state. The effect of the surface exerted on the atoms can sufficiently change the interatomic resonance interaction. This near-surface effect on resonance interaction can be used to control atoms and can help to build on-chip quantum devices, new types of light sources, and quantum storage devices.

A. Knorr, K.‐E. Süsse, D.‐G. Welsch

The influence of interatomic interactions on the coherently emitted transient in resonance fluorescence from a condensed-matter sample of identical two-level atoms is studied for the ultratransient regime. A closed solution of the modified Bloch equations is given. Temporal and spectral properties of the coherently emitted light as well as chirping are discussed.

Constantine Mavroyannis

Ettore Vitali, Gino E. Gamboni

Feshbach resonances, first studied in the context of nuclear reactions, have since become a cornerstone of modern atomic physics. They offer a remarkable degree of control over interatomic (and even intermolecular) interactions by tuning external magnetic fields. This tunability arises from the interplay between quantum scattering and the internal structure of atoms or nuclei. In this work, we explore the essential physics of Feshbach resonances using only basic quantum mechanics, aiming to make this powerful concept accessible to educators and students alike.

Kolanz, Max