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arXiv 0903.4971hep-thgr-qc
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AdS5电磁场的Casimir能量与宇宙学常数问题

Casimir Energy of AdS5 Electromagnetism and Cosmological Constant Problem

S. Ichinose

摘要:

计算了扭曲几何中的5D电磁场的Casimir能量。将其与平坦情况(arXiv:0801.3064)进行比较。提出了一种新的正则化方法,称为球格正则化。它基于最小面积原理,是重整化群的几何方法的直接实现。Casimir能量的适当正则化形式以封闭形式表示。我们数值计算了$\La$(4D UV截止)、$\om$(5D体积曲率、翘曲参数)和$T$(额外空间红外参数)对Casimir能量的依赖性。翘曲参数$\om$受到重整化效应的影响。我们研究了权函数的意义,并最终得到了Casimir能量的一个新定义,其中4D动量(或坐标)被量化为额外的坐标作为欧几里得时间。最后,我们对宇宙学项进行了评论。

英文摘要:

Casimir energy is calculated for the 5D electromagnetism in the warped geometry. It is compared with the flat case(arXiv:0801.3064). A new regularization, called sphere lattice regularization, is taken. It is based on the minimal area principle and is a direct realization of the geometrical approach to the renormalization group. The properly regularized form of Casimir energy, is expressed in a closed form. We numerically evaluate $\La$(4D UV-cutoff), $\om$(5D bulk curvature, warp parameter) and $T$(extra space IR parameter) dependence of the Casimir energy. The warp parameter $\om$ suffers from the renormalization effect. We examine the meaning of the weight function and finally reach a new definition of the Casimir energy where the 4D momenta(or coordinates) are quantized with the extra coordinate as the Euclidean time. We comment on the cosmological term at the end.

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