Applications of Rydberg-dressing in few-body physics

Using a laser far-detuned from a highly excited state, a ground state atom can be dressed by a small amount of Rydberg character. This technique is called Rydberg-dressing, which has attracted recent interest and was proposed to study many-body physics such as dipolar BEC, supersolid vortex crystals in BEC, and atomic Rydberg reservoirs for polar molecules. In this work, we apply Rydberg-dressing to the study of few-body physics. By using Rydberg-dressed interactions, ultracold chemical reactions can be manipulated and controlled. We also study the possibility of applying Rydberg-dressing to form a new kind of ``chemical bond'' and create ultra-long-range molecules.