Parametric Driving of Dark Solitons in Atomic Bose-Einstein Condensates
N. P. ProukakisDepartment of Physics, University of Durham, South Road, Durham, DH1 3LE, United KingdomN. G. ParkerDepartment of Physics, University of Durham, South Road, Durham, DH1 3LE, United KingdomCarlo F. BarenghiDepartment of Physics, University of Durham, South Road, Durham, DH1 3LE, United Kingdomand C. S. AdamsDepartment of Physics, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
2004en
ABI
Abstract
A dark soliton oscillating in an elongated harmonically confined atomic Bose-Einstein condensate continuously exchanges energy with the sound field. Periodic optical paddles are employed to controllably enhance the sound density and transfer energy to the soliton, analogous to parametric driving. In the absence of damping, the amplitude of the soliton oscillations can be dramatically reduced, whereas with damping, a driven soliton equilibrates as a stable soliton with lower energy, thereby extending the soliton lifetime up to the lifetime of the condensate.
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