Phase Imprinting in a Scanning Ring Trap

Our results on phase imprinting in a scanning ring trap have been published in Physical Review A. We find that unidirectional scanning leads to a non-trivial phase profile of the condensate that can be approximated analytically using the concept of phase imprinting. This could be used to imprint persistent currents into a ring, or for schemes to provide synthetic rotation for interferometer characterisation. By adapting a bidirectional scan, the phase imprint can be periodically cancelled.