Phys. Rev. Lett. 101, 120406 (2008) [4 pages]Collisions of Dark Solitons in Elongated Bose-Einstein CondensatesReceived 13 May 2008; published 19 September 2008 We present experimental data showing the head-on collision of dark solitons generated in an elongated Bose-Einstein condensate. No discernable interaction can be recorded, in full agreement with the fundamental theoretical concepts of solitons as mutually transparent quasiparticles. Our soliton generation technique allows for the creation of solitons with different depths; hence, they can be distinguished and their trajectories be followed. Simulations of the 1D-Gross-Pitaevskii equation have been performed to compare the experiment with a mean-field description. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.120406
DOI:
10.1103/PhysRevLett.101.120406
PACS:
03.75.Lm, 05.45.Yv, 42.65.Tg, 67.85.De
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