Experimental work on cold, trapped metastable noble gases is reviewed. The aspects which
distinguish work with these atoms from the large body of work on cold, trapped atoms in …

We review phase-space techniques based on the Wigner representation that provide an
approximate description of dilute ultra-cold Bose gases. In this approach the quantum field …

Bose-Einstein condensates of rubidium atoms are stored in a two-dimensional periodic
dipole force potential, formed by a pair of standing wave laser fields. The resulting potential …

We have used an extension of our slow light technique to provide a method for inducing
small density defects in a Bose-Einstein condensate. These sub-resolution, micrometer …

Impurity atoms propagating at variable velocities through a trapped Bose-Einstein
condensate were produced using a stimulated Raman transition. The redistribution of …

We demonstrate submicron spatial control of interatomic interactions in a Bose-Einstein
condensate of ytterbium (Yb). A pulsed optical standing wave, tuned near an optical …

We present an analytic theory of the diffraction of (matter) waves by a lattice in the “quasi-
Bragg" regime, by which we mean the transition region between the long-interaction Bragg …

In this thesis I report on experiments that enter a new regime in the many body physics of
ultracold atomic gases. A Bose-Einstein condensate is loaded into a three-dimensional …

We consider the problem of cold atomic collisions in tight traps, where the absolute
scattering length may be larger than the trap size. As long as the size of the trap ground state …

We study atom scattering from two colliding Bose-Einstein condensates using a position
sensitive, time resolved, single atom detector. In analogy to quantum optics, the process can …