Abstract

Research focusing on the formation of ultracold atomic and molecular quantum gases is a continuously expanding field due to its envisioned applications such as quantum-controlled chemistry or quantum simulation. The aim of our theoretical work is to find ways to suppress inelastic or reactive processes between colliding particles in ultracold quantum gases. Using a laser field detuned to the blue of a relevant transition, we propose to couple the initial colliding particle state to a repulsive excited one, thus preventing the particles to come close to each other. This ``blueshielding'' technique is applied for ultracold quantum gases, close to quantum degeneracy. We investigate the optical shielding in ultracold 39K-Cs collision by using close-coupling channel method.

© 2019 IEEE