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arXiv quant-ph/0506131quant-ph
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额外维度中的黑体辐射

Black-body radiation in extra dimensions

H. Alnes, F. Ravndal, I. K. Wehus

摘要:

利用标准的动力学和热力学参数,将黑体辐射能量密度的Stefan-Boltzmann定律的一般形式推广到额外维的时空。从统计力学可以得到一个精确的公式。在场论推导中,麦克斯韦场必须被量子化。在四维以上的时空中,电场和磁场的概念是不同的。虽然麦克斯韦场的能量-动量张量在四维空间中是无迹的,但当存在额外维度时就不是这样了。但它的热平均是无迹的,与热力学结果一致。

英文摘要:

The general form of the Stefan-Boltzmann law for the energy density of black-body radiation is generalized to a spacetime with extra dimensions using standard kinetic and thermodynamic arguments. From statistical mechanics one obtains an exact formula. In a field-theoretic derivation, the Maxwell field must be quantized. The notion of electric and magnetic fields is different in spacetimes with more than four dimensions. While the energy-momentum tensor for the Maxwell field is traceless in four dimensions, it is not so when there are extra dimensions. But it is shown that its thermal average is traceless and in agreement with the thermodynamic results.

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