At timescales once deemed immeasurably small by Einstein, the random movement of Brownian particles in a liquid is expected to be replaced by ballistic motion. So far, an experimental verification of this prediction has been out of reach due to a lack of instrumentation fast and precise enough to capture...

Due to an initial interest in sympathetic cooling of Lithium-6 with Ultra-Cold Rubidium isotopes our lab in Vancouver Canada found itself dealing with multi-species traps and being drawing into a wide variety of studies of collisions with cold atoms. I will provide an overview of our collision experiments...

Phase space portraits have been constructed and analyzed for noisy (nonperiodic) data obtained in an experiment on a nonequilibrium homogenous chemical reaction.  The phase space trajectories define a limit set that is an ‘attractor’? ‘ following a perturbation, the trajectory quickly...

A supersonic beam of noble gas atoms is a source of unprecedented brightness.Anovel short pulse supersonic nozzle is developed with beam intensity that is higher by at least an order of magnitude than other available sources. We show how this beam can be coherently slowed and focused using elastic reflection from...

We discuss the relationship between recent proposals of ‘atom diodes’ or oneway barriers for ultracold atoms and a Maxwell demon valve: in particular the way in which these proposals make use of dissipation via a one-photon spontaneous emission and avoid violation of the second law.

We study theoretically the few-body dynamics of atoms which leak out of a trap by tunneling through a thin barrier. We consider the two cases of bosons with strongly repulsive contact interactions and spinless fermions with strongly attractive contact interactions Bose and Fermi Tonk-Girardeau gases,...

We propose a method to produce a definite number of ground-state atoms by adiabatic reduction of the depth of a potential well that confines a degenerate Bose gas with repulsive interactions. Using a variety of methods, we map out the maximum number of particles that can be supported by the well as a...

We develop the Wigner phase space representation of a kicked particle for an arbitrary but periodic kicking potential. We use this formalism to illustrate quantum resonances and anti-resonances.

We propose two experimentally feasible methods based on atom interferometry to measure the quantum state of the kicked rotor.

We propose a quantum tweezer for extracting a desired number of neutral atoms from a reservoir. A trapped Bose-Einstein condensate is used as the reservoir, taking advantage of its coherent nature, which can guarantee a constant outcome. The tweezer is an attractive quantum dot, which may be generated...