The ability to control the motion of ultra-cold atoms at nanokelvin temperatures with lasers has also led to the desire to measure with collective and macroscopic states of quantum-degenerate matter. For furthering these promises we theoretically investigate the use of resonant atom-atom collisions to improve the sensitivity of atom interferometers and to develop novel means to slow and cool atomic clouds. In parallel, we study ways to prepare non-classical states of matter, such as squeezed and Schrödinger cat states, by engineering effective multi-body interactions.
Directions (in random order):
Caption for image in top right: Schematic of evaporative cooling with a narrow collisional resonance. Atoms (filled orange circles) with their kinetic energy along the vertical axis and location along the horizontal axis are held in a magnetic or optical bottle (parabolic curve). Pairs of colliding atoms with a relative kinetic energy, two such pairs are indicated with black angled arrows, in a narrow range or window around the location of the resonance, here at Eres, are removed. Once all atom pairs in this relative kinetic energy window are removed the resonance is lowered to smaller collision.