期刊
NEW JOURNAL OF PHYSICS
卷 18, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/18/2/025004
关键词
ring-trap; matter-waves; atomtronics; solitary waves; density engineering; quantum gases
资金
- UK EPSRC [EP/I019413/1, EP/K03250X/1]
- EPSRC [EP/I019413/1, EP/K03250X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I019413/1, EP/K03250X/1] Funding Source: researchfish
We demonstrate the feasibility of generation of quasi-stable counter-propagating solitonic structures in an atomic Bose-Einstein condensate confined in a realistic toroidal geometry, and identify optimal parameter regimes for their experimental observation. Using density engineering we numerically identify distinct regimes of motion of the emerging macroscopic excitations, including both solitonic motion along the azimuthal ring direction, such that structures remain visible after multiple collisions even in the presence of thermal fluctuations, and snaking instabilities leading to the decay of the excitations into vortical structures. Our analysis, which considers both mean field effects and fluctuations, is based on the ring trap geometry of Murray et al (2013 Phys. Rev. A88 053615).
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