Collisionless and Hydrodynamic Excitations of a Bose-Einstein Condensate
Collisionless and Hydrodynamic Excitations of a Bose-Einstein Condensate
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DOI：
10.1103/physrevlett.81.500
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发表时间：
1998-07
影响因子：
8.6
通讯作者：
D. Stamper-Kurn;H. Miesner;S. Inouye;M. R. Andrews;W. Ketterle
中科院分区：
文献类型：
--
作者：
D. Stamper-Kurn;H. Miesner;S. Inouye;M. R. Andrews;W. Ketterle
稀释玻色气体的集体激发在玻色-爱因斯坦凝聚温度上下进行了探测。凝结水振荡频率和阻尼率的温度依赖性表明凝结水与热云之间存在显著的相互作用。观察到类似于第一声的热云流体动力振荡。研究了热云和凝结物的异相偶极振荡，类似于第二声。使用无损成像技术在原位观察激发。[s0031 - 9007 (98) 06661 - 7]
Collective excitations of a dilute Bose gas were probed above and below the Bose-Einstein condensation temperature. The temperature dependencies of the frequency and damping rates of condensate oscillations indicate significant interactions between the condensate and the thermal cloud. Hydrodynamic oscillations of the thermal cloud analogous to first sound were observed. An outof-phase dipolar oscillation of the thermal cloud and the condensate was also studied, analogous to second sound. The excitations were observed in situ using nondestructive imaging techniques. [S0031-9007(98)06661-7]