AUTHOR=Song Yu , Mo Yu , Feng Shiping , Yang Shi-Jie 

TITLE=Emission of Solitons From an Obstacle Moving in the Bose-Einstein Condensate

JOURNAL=Frontiers in Physics

VOLUME=9

YEAR=2021

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.784564

DOI=10.3389/fphy.2021.784564

ISSN=2296-424X

ABSTRACT=<p>Dark solitons dynamically generated from a potential moving in a one-dimensional Bose-Einstein condensate are displayed. Based on numerical simulations of the Gross-Pitaevskii equation, we find that the moving obstacle successively emits a series of solitons which propagate at constant speeds. The dependence of soliton emission on the system parameters is examined. The formation mechanism of solitons is interpreted as interference between a diffusing wavepacket and the condensate background, enhanced by the nonlinear interactions.</p><p>PACS numbers: 03.75.Mn, 03.75.Lm, 05.30.Jp</p>