K Bongs et al 2003 J. Opt. B: Quantum Semiclass. Opt. 5 S124 doi:10.1088/1464-4266/5/2/369
K Bongs1, S Burger2, D Hellweg3, M Kottke3, S Dettmer3, T Rinkleff3, L Cacciapuoti3, J Arlt3, K Sengstock1 and W Ertmer3
Show affiliationsExperimental and numerical studies of the velocity field of dark solitons in Bose–Einstein condensates are presented. The formation process after phase imprinting as well as the propagation of the emerging soliton are investigated using spatially resolved Bragg spectroscopy of soliton states in Bose–Einstein condensates of 87Rb. A comparison of experimental data to results from numerical simulations of the Gross–Pitaevskii equation clearly identifies the flux underlying a dark soliton propagating in a Bose–Einstein condensate. The results allow further optimization of the phase imprinting method for creating collective excitations of Bose–Einstein condensates.
03.75.Be Atom and neutron optics
03.75.Kk Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow
Issue 2 (April 2003)
Received 31 October 2002, in final form 20 December 2002
Published 2 April 2003
K Bongs et al 2003 J. Opt. B: Quantum Semiclass. Opt. 5 S124
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