Interferometry and rotational sensing with interacting Bose-condensed atoms
Joint Quantum Centre (JQC) Durham-Newcastle, Department of Physics, Durham University, UK
The development of the laser had a huge impact on optical interferometry, largely due to improved signal to noise. One might think that the relatively routine production of atomic Bose-Einstein Condensates would have a comparable impact on atom interferometry, however the situation is complicated by the prevalence of atom-atom interactions, in contrast to the case linearly propagating light. One approach can be to lift the influence of such interactions, either through making the samples dilute, or exploiting magnetic Feshbach resonances to minimise the lowest-order contributions to atom atom interactions. Alternatively, one can consider the possibility of stable nonlinear structures (bright solitons), or quasi-homogeneous ring geometries such that interactions, while present, are not disruptive. We will consider this approach in some detail, for both attractive (bright solitons) and repulsive (ring geometries) interactions.