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arXiv quant-ph/0412003quant-ph
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近场干涉仪中分子温度对富勒烯相干性的影响

Influence of molecular temperature on the coherence of fullerenes in a near-field interferometer

Klaus Hornberger, Lucia Hackermueller, Markus Arndt

摘要:

我们在Talbot-Lau干涉仪中研究了C_(70)富勒烯物质波随温度的变化。虽然理想的条纹可见度是在中等的分子温度下观察到的,我们发现一个逐渐退化的干涉对比度,如果分子被加热之前进入干涉仪。提出了一种计算自由飞行分子微正则温度分布的方法。通过这种方式,干涉对比度的加热依赖性降低可以与量子理论的预测进行比较。我们发现,所观察到的相干性损失同意定量预期的退相干率由于热分子发出的热辐射。

英文摘要:

We study C70 fullerene matter waves in a Talbot-Lau interferometer as a function of their temperature. While the ideal fringe visibility is observed at moderate molecular temperatures, we find a gradual degradation of the interference contrast if the molecules are heated before entering the interferometer. A method is developed to assess the distribution of the micro-canonical temperatures of the molecules in free flight. This way the heating-dependent reduction of interference contrast can be compared with the predictions of quantum theory. We find that the observed loss of coherence agrees quantitatively with the expected decoherence rate due to the thermal radiation emitted by the hot molecules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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