The gravitational acceleration of antimatter has never been measured directly. Antihydrogen
atoms, being both stable and neutral, are an ideal system for investigating antimatter gravity …

We demonstrate how simultaneously operated 39 K–87 Rb interferometers exhibiting a high
level of correlation can be used to make competitive tests of the university of free fall. This …

Using a novel magnetic trapping geometry we have evaporatively cooled metastable helium
atoms to form a Bose–Einstein condensate containing approximately one million atoms. This …

We report on the achievement of quantum degeneracy in both components of a Bose-Fermi
mixture of metastable helium atoms, He* 4 and He* 3. Degeneracy is achieved via Doppler …

We report the realization of Bose-Einstein condensation (BEC) of metastable helium atoms
using an in-vacuum coil magnetic trap and a crossed-beam optical dipole trap. A …

The weak equivalence principle (WEP) in the quantum regime has been the subject of many
studies with a broad range of approaches to the problem. Here, we tackle the problem anew …

A novel apparatus has been developed in which atoms in a magneto-optical trap are used
as targets in ion-atom collision experiments. The apparatus is an extension of earlier …

We present the detection of the highly forbidden 2 S 3 1→ 3 S 3 1 atomic transition in
helium, the weakest transition observed in any neutral atom. Our measurements of the …

We have observed the effects of magnetic field gradients and gravitational acceleration on
grating echoes in a time-domain single state atom interferometer that uses laser cooled Rb …

We present a discussion on the time-of-flight (TOF) technique for measuring temperature of
cold atom clouds, with specific focus on fountain experiments. In these experiments, there …