4212 2000 2000 eng 214 215 conferenceobject 0 -- -- -- Dark solitons in Bose-Einstein condensates Quantum Electronics and Laser Science Conference (QELS 2000) Sven Burger Kai Bongs S. Dettmer Wolfgang Ertmer Klaus Sengstock Anna Sanpera Gora Shlyapnikov Maciej Lewenstein Burger, Sven