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arXiv 1003.4286hep-thhep-ph
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膜世界中的Casimir力:格林函数和Zeta函数方法的一致结果

Casimir force in brane worlds: coinciding results from Green's and Zeta function approaches

Roman Linares, Hugo A. Morales-Tecotl, Omar Pedraza

摘要:

卡西米尔力将场模的结构编码为真空涨落,因此它对膜世界的额外维度很敏感。现在,在任意维的平坦时空中,卡西米尔力的两种标准方法,格林函数和zeta函数,产生相同的结果,但对于膜世界模型,这只是假设。在这项工作中,我们表明这两种方法产生相同的Casimir力的情况下,普遍额外的维度和兰德尔Sundrum的情况下,一个和两个膜增加了p紧凑的尺寸。基本上,在格林函数方法中进入卡西米尔力的模式本征函数的细节由于它们与涉及板的右超体积的测量的正交关系而被去除,这只留下来自Zeta函数方法的贡献。目前的分析纠正了以前的结果显示单膜兰德尔-Sundrum的两种方法之间的差异,这是由于一个错误的超体积的板介绍了作者使用格林函数时。对于我们在这里讨论的所有模型,产生的卡西米尔力可以用两个四维卡西米尔力贡献来简洁地表示:一个是无质量模式,另一个是与额外维度相关的有质量模式。

英文摘要:

Casimir force encodes the structure of the field modes as vacuum fluctuations and so it is sensitive to the extra dimensions of brane worlds. Now, in flat spacetimes of arbitrary dimension the two standard approaches to the Casimir force, Green's function and zeta function, yield the same result, but for brane world models this was only assumed. In this work we show both approaches yield the same Casimir force in the case of Universal Extra Dimensions and Randall-Sundrum scenarios with one and two branes added by p compact dimensions. Essentially, the details of the mode eigenfunctions that enter the Casimir force in the Green's function approach get removed due to their orthogonality relations with a measure involving the right hyper-volume of the plates and this leaves just the contribution coming from the Zeta function approach. The present analysis corrects previous results showing a difference between the two approaches for the single brane Randall-Sundrum; this was due to an erroneous hyper-volume of the plates introduced by the authors when using the Green's function. For all the models we discuss here, the resulting Casimir force can be neatly expressed in terms of two four dimensional Casimir force contributions: one for the massless mode and the other for a tower of massive modes associated with the extra dimensions.

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