title: Controlled generation of dark solitons with phase imprinting.
abstract: The generation of dark solitons in Bose-Einstein condensates with phase imprinting is studied by mapping it into the classic problem of a damped driven pendulum. We provide a simple but powerful scheme, designing the phase imprint for various desired outcomes of soliton generation. For a given phase step, we derive a formula for the number of dark solitons traveling in each direction, and examine the physics behind the generation of counterpropagating dark solitons.
authors.affiliation: Department of Physics, The University of Texas, Austin, Texas 78712-1081, USA.
authors.forename: Biao
authors.initials: B
authors.lastname: Wu
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: Qian
authors.initials: Q
authors.lastname: Niu