Evidence for an oscillating soliton/vortex ring by density engineering of a Bose-Einstein condensate

I. Shomroni, E. Lahoud, S. Levy, J. Steinhauer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

140 Scopus citations

Abstract

When two Bose-Einstein condensates collide with high collisional energy, the celebrated matter-wave interference pattern appears. For lower collisional energies, the repulsive interaction energy becomes significant, and the interference pattern evolves into an array of grey solitons. But the lowest collisional energies, producing a single pair of solitons, have not been probed so far. Here, we report on experiments using density engineering on the healing length scale to produce such a pair of solitons. We see evidence that the solitons evolve periodically between vortex rings and solitons. The stable, periodic evolution is in sharp contrast to the behaviour seen in previous experiments in which the solitons decay irreversibly into vortex rings through the so-called snake instability. The evolution can be understood in terms of conservation of mass and energy in a narrow condensate.

Original languageAmerican English
Pages (from-to)193-197
Number of pages5
JournalNature Physics
Volume5
Issue number3
DOIs
StatePublished - Mar 2009
Externally publishedYes

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