Two Rydberg-dressed atoms escaping from an open well

A comprehensive analysis of the dynamics two Rydberg-dressed particles (bosons or fermions) tunneling from a potential well into open space is provided. We show that dominant decay mechanism switches sequential to pair when interaction strength tuned below certain critical value. These values can be modified by tuning effective range potential. By comparing bosons and fermions, we there are significant differences between cases. In particular, increasing modifies rate in opposite ways for fermions bosons. Furthermore, fermionic system much stronger attractive interactions needed achieve tunneling. The results provide insight systems and, light recent realizations few-body Rydberg dressing atoms, they offer promise future experiments.