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arXiv 1708.08730hep-thmath-phmath.MP
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通过泛函行列式的降维实现真空能

Vacuum energy via dimensional reduction of functional determinants

Cesar D. Fosco, Francisco D. Mazzitelli

摘要:

我们应用“降维”机制的真空能量的一个真正的标量场在非平凡的背景下,在d+1维的存在下的功能积分的评价。通过将Gelfand-Yaglom定理的推广版本应用于相应的函数行列式来实现减少。该过程的主要结果是Casimir能量的另一种表示,它涉及比原始问题少一个空间维度。我们表明,对于某些配置,可以获得有关减少的问题的重要信息。我们还表明,减少的问题允许引入一个近似方案,这是新颖的在这种情况下。

英文摘要:

We apply a `dimensional reduction' mechanism to the evaluation of the functional integral for the vacuum energy of a real scalar field in the presence of non-trivial backgrounds, in d+1 dimensions. The reduction is implemented by applying a generalized version of Gelfand-Yaglom's theorem to the corresponding functional determinant. The main outcome of that procedure is an alternative representation for the Casimir energy, which involves one spatial dimension less than the original problem. We show that, for some configurations, important information about the reduced problem can be obtained. We also show that the reduced problem allows for the introduction of an approximation scheme which is novel within this context.

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