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arXiv physics/0608074physics.atom-phcond-mat.softquant-ph
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Casimir-Polder力温度依赖性的测量

Measurement of the Temperature Dependence of the Casimir-Polder Force

J. M. Obrecht, R. J. Wild, M. Antezza, L. P. Pitaevskii, S. Stringari, E. A. Cornell

摘要:

我们报告的Casimir-Polder力的温度依赖性的第一次测量。这种测量是通过将接近纯的87-Rb玻色-爱因斯坦凝聚体放置在离电介质衬底几微米的地方并激发其偶极振荡来获得的。磁囚禁原子的集体振荡频率的变化是由表面原子力的空间变化引起的。在我们的实验中,电介质衬底被加热到605 K,而周围环境保持在室温附近(310 K)。的Casimir-Polder力的效果被测量为近3倍大的605 K的基板比室温基板,显示出明确的温度依赖性与理论一致。

英文摘要:

We report on the first measurement of a temperature dependence of the Casimir-Polder force. This measurement was obtained by positioning a nearly pure 87-Rb Bose-Einstein condensate a few microns from a dielectric substrate and exciting its dipole oscillation. Changes in the collective oscillation frequency of the magnetically trapped atoms result from spatial variations in the surface-atom force. In our experiment, the dielectric substrate is heated up to 605 K, while the surrounding environment is kept near room temperature (310 K). The effect of the Casimir-Polder force is measured to be nearly 3 times larger for a 605 K substrate than for a room-temperature substrate, showing a clear temperature dependence in agreement with theory.

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