Collisionless and Hydrodynamic Excitations of a Bose-Einstein Condensate
作者： D. M. Stamper-Kurn , H.-J. Miesner , S. Inouye , M. R. Andrews , W. Ketterle
DOI: 10.1103/PHYSREVLETT.81.500
关键词: Atomic physics 、 Condensation temperature 、 Oscillation 、 Thermal 、 Quasiparticle 、 Physics 、 Bose–Einstein condensate 、 Bose gas 、 Condensed matter physics 、 Second sound 、 Dipole
摘要: Collective excitations of a dilute Bose gas were probed above and below the Bose-Einstein condensation temperature. The temperature dependencies frequency damping rates condensate oscillations indicate significant interactions between thermal cloud. Hydrodynamic cloud analogous to first sound observed. An out-of-phase dipolar oscillation was also studied, second sound. observed in situ using nondestructive imaging techniques.
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