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arXiv 0811.2409quant-phhep-th
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声子Casimir效应的模拟模型

The Phononic Casimir Effect: An Analog Model

L. H. Ford, N. F. Svaiter

摘要:

讨论了线性色散流体中声波的量子化,计算了几种情况下流体的量子密度涨落。这些包括处于其基态的流体。在这种情况下,我们讨论了光的散射截面的密度波动,并发现,在许多情况下,它是小的相比,热波动,但不是可以忽略不计的小,并可能在室温下观察到。我们还考虑了流体的声子和流体的压缩状态包含边界。我们认为,后者可能是一个有用的模拟模型,更好地理解在量子场论的边界效应。在我们考虑的所有涉及边界的情况下,均方密度涨落都因边界的存在而减小。这意味着光散射截面的减小,这是潜在的可观察效应。

英文摘要:

We discuss the quantization of sound waves in a fluid with a linear dispersion relation and calculate the quantum density fluctuations of the fluid in several cases. These include a fluid in its ground state. In this case, we discuss the scattering cross section of light by the density fluctuations, and find that in many situations it is small compared to the thermal fluctuations, but not negligibly small and might be observable at room temperature. We also consider a fluid in a squeezed state of phonons and fluids containing boundaries. We suggest that the latter may be a useful analog model for better understanding boundary effects in quantum field theory. In all cases involving boundaries which we consider, the mean squared density fluctuations are reduced by the presence of the boundary. This implies a reduction in the light scattering cross section, which is potentially an observable effect.

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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