Our research focuses on the study of interactions between cold Rydberg atoms. The main motivation is the understanding of interacting many-body dynamics and multi-particle entanglement. Strongly interacting cold atoms have applications in Quantum technologies, and we have ongoing projects on DQC1 – deterministic quantum computation with one clean qubit – (computation based on mixed-states) and we will soon start feasibility studies on the potential implementation of quantum enhanced sensing based on cold atoms in microscopic dipole traps. Rydberg-Rydberg interactions can be also applied to the simulation of condensed matter systems where electron-phonon interactions are of particular importance. Such systems are not amenable to simulation by classical computers, but promising advances in cold-atoms quantum simulators may provide a pathway to better understanding of, for example, exotic superconductors in which the electron-phonon interaction plays a key role.