期刊
NATURE COMMUNICATIONS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms2893
关键词
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资金
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/F002068/1]
- European Science Foundation within the EUROCORES Programme EuroQUASAR (EPSRC) [EP/G026602/1]
- Marsden Fund of New Zealand [UOO162]
- Royal Society of New Zealand [UOO004]
- EPSRC [EP/G056781/1]
- Royal Society of London [IE110202]
- EPSRC [EP/F002068/1, EP/G056781/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G056781/1, EP/F002068/1] Funding Source: researchfish
Bright solitons are non-dispersive wave solutions, arising in a diverse range of nonlinear, one-dimensional systems, including atomic Bose-Einstein condensates with attractive interactions. In reality, cold-atom experiments can only approach the idealized one-dimensional limit necessary for the realization of true solitons. Nevertheless, it remains possible to create bright solitary waves, the three-dimensional analogue of solitons, which maintain many of the key properties of their one-dimensional counterparts. Such solitary waves offer many potential applications and provide a rich testing ground for theoretical treatments of many-body quantum systems. Here we report the controlled formation of a bright solitary matter-wave from a Bose-Einstein condensate of Rb-85, which is observed to propagate over a distance of similar to 1.1 mm in 150 ms with no observable dispersion. We demonstrate the reflection of a solitary wave from a repulsive Gaussian barrier and contrast this to the case of a repulsive condensate, in both cases finding excellent agreement with theoretical simulations using the three-dimensional Gross-Pitaevskii equation.
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