We consider the noncondensate part of the Bose gas in presence of dark solitons.We get a stationary equation of Bogoliubov quasiparticles and find that these Bogoliubov quasiparticles are confined by a dark soliton an...We consider the noncondensate part of the Bose gas in presence of dark solitons.We get a stationary equation of Bogoliubov quasiparticles and find that these Bogoliubov quasiparticles are confined by a dark soliton and carried to propagate with it.This model of the compound structure of the soliton and Bogoliubov quasiparticles provides more precise description of localized sound excitations in Bose-Einstein condensates.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19392503.
文摘We consider the noncondensate part of the Bose gas in presence of dark solitons.We get a stationary equation of Bogoliubov quasiparticles and find that these Bogoliubov quasiparticles are confined by a dark soliton and carried to propagate with it.This model of the compound structure of the soliton and Bogoliubov quasiparticles provides more precise description of localized sound excitations in Bose-Einstein condensates.