Dynamics of dark solitons in elongated Bose-Einstein condensates.
We find two types of moving dark soliton textures in elongated condensates: nonstationary kinks and proper dark solitons. The latter have a flat notch region and we obtain the diagram of their dynamical stability. At finite temperatures the dynamically stable solitons decay due to the thermodynamic instability. We develop a theory of their dissipative dynamics and explain experimental data.
Muryshev
A
A
Russian Research Center Kurchatov Institute, Kurchatov Square, 123182 Moscow, Russia.
Shlyapnikov
G V
GV
Ertmer
W
W
Sengstock
K
K
Lewenstein
M
M